Where is my hip pain coming from?

Hip pain can feel like it is “in the hip”, but that label covers several different structures from the deep hip joint in the groin to the tendons and bursae over the outside of the hip. A practical first step is to map the pain to a place (front/groin, outer hip, inner thigh, or high hamstring), then pair it with how it behaves (stiffness, snapping, night pain, catching). These are guides rather than rules, and the same person can have more than one pain generator at the same time.

A simple location-based pattern often helps organise the possibilities:

• Deep groin pain or pain at the front of the thigh, especially with stiffness or reduced hip movement, can point towards the hip joint itself. In active adults, femoroacetabular impingement syndrome (FAIS) is one recognised cause of hip/groin pain, often with clicking, catching or giving way and reduced range of motion. Labral problems can sit alongside this and may contribute to catching, clicking or “locking” sensations.
• Pain on the outer side of the hip (over the greater trochanter) is more often linked to soft tissues around the hip, such as greater trochanteric pain syndrome (GTPS). Clinical guidance commonly describes GTPS pain as being aggravated by lying on the affected side, walking and stairs, and notes it is common in women aged 40–60.
• A sharp “pull” in the inner thigh/groin during or after sport can be more consistent with an adductor strain (“groin pull”) from the medial thigh compartment. Sudden sharp pain high in the back of the thigh with a “pop” is a typical description for a hamstring injury, which behaves differently from gradual hip joint arthritis-type pain.

Other patterns that often come up in hip clinics include night pain, snapping or popping around the hip, a sense the joint is catching, and—less commonly—more serious hip joint conditions such as avascular necrosis, where early symptoms may be subtle before pain and stiffness become more established. Rather than repeating long safety lists in each section, urgent warning signs and when to escalate are best kept in one place; UK health-service advice includes seeking timely review when hip pain affects sleep or persists/worsens, and urgent assessment for sudden severe presentations.

In the UK, the usual pathway starts with sensible short-term self-management and/or a GP review when symptoms are persistent or affecting daily activities, then progresses to a specialist hip assessment when the pattern is complex or not settling. A hip-focused assessment typically starts with the story (for example, a 3‑month gradual stiffness versus a same-day “pop”), then an examination of hip joint movement and pain provocation, and only then a decision on whether imaging (such as an X-ray or MRI) is likely to help—because scans are most useful when interpreted in the context of symptoms and examination findings.

Lincolnshire Hip is a hip-only service within the MSK Doctors group, with local access points including Sleaford and Grantham, and accepts patients without referral for hip assessment when that next step is needed.

Hip pain at night or lying on your side

Being woken at night by pain over the outside of the hip, or finding it impossible to lie on one side, often points to irritation of the soft tissues that sit over the bony prominence on the side of the hip (the greater trochanter). This pattern is commonly labelled greater trochanteric pain syndrome (GTPS), and UK NHS resources describe it as largely involving gluteal tendons and/or the trochanteric bursa next to (rather than inside) the ball-and-socket hip joint; it is reported more often in women aged 40–60.

The behaviour of GTPS-type pain can be a useful clue: it is often aggravated by direct pressure (lying on the sore side), and also by tasks that load the outer hip such as walking, climbing stairs, or standing on one leg. By contrast, pain that feels deeper in the hip joint (often described in the groin) is more likely to be linked with joint problems such as arthritis, where stiffness and “start-up” pain after rest can be more prominent than tenderness to pressure on the side.

Early self-management is usually about reducing repeated compression and gradually rebuilding capacity in the hip abductors (the muscles that hold the pelvis level in walking). Practical, low‑tech steps commonly used in NHS advice for lateral hip pain include:

• Positioning in bed to offload the painful side (for example, a pillow between the knees to reduce hip strain).
• Temporarily avoiding lying directly on the sore side, and avoiding prolonged postures that pinch the outer hip.
• Load modification and pacing (shorter, tolerable bouts of walking/standing rather than repeatedly “pushing through”).
• Avoiding repeated leg crossing if it reliably triggers outer‑hip pain.
• Gentle, progressive gluteal/hip abductor strengthening if it is comfortable to start, recognising that exact exercise “dosing” varies and is still being refined.

Many cases improve with time and a structured rehab approach, but it can be slow: NHS guidance notes that rehabilitation for GTPS commonly takes around 6–12 months, with flare‑ups along the way. If symptoms are not settling, or if there is uncertainty about whether pain is coming from the hip joint versus the surrounding soft tissues, a hip‑focused clinical assessment can help plan the next step (for example, targeted physiotherapy and, where needed, imaging).

Red‑flag situations are different from typical GTPS and need urgent assessment rather than watchful waiting. NHS advice highlights seeking urgent or emergency help for sudden severe hip pain, inability to weight‑bear, a hot or very swollen hip, fever/feeling generally unwell, or hip pain after significant trauma. For non‑emergency presentations, NHS guidance also flags escalation when hip pain is affecting sleep, is worsening or persistent (for example beyond about 2 weeks), or when morning stiffness lasts more than 30 minutes. Service access details are kept to a single line here (rather than repeated throughout): Lincolnshire Hip supports hip‑specific assessment for persistent night and side‑lying hip pain.

Groin pain, stiffness and femoroacetabular impingement

Deep pain in the groin or right at the front of the hip that flares when the hip is bent up (for example in a deep squat, getting in and out of a low car, or twisting in football) is one pattern that can come from inside the hip joint. People often describe a “C‑sign” ache around the front of the hip, along with stiffness after sitting and a feeling that the hip does not move as freely as it used to in flexion or rotation.

One possible explanation is femoroacetabular impingement (FAI), more often discussed clinically as femoroacetabular impingement syndrome (FAIS). In simple terms, extra bone around the ball (the femoral head–neck junction) and/or the edge of the socket (the acetabular rim) reduces clearance in the ball‑and‑socket hip joint, so the bones can abut earlier during flexion and rotation. It is described as a recognised cause of hip and groin pain in young and middle‑aged adults, and it is about hip shape rather than “doing the wrong sport”.

Alongside pain and stiffness, FAIS is often linked with reduced range of motion and mechanical symptoms such as clicking, catching, buckling or “giving way”, particularly with repeated bending and twisting tasks. Common first steps in day‑to‑day management focus on reducing the specific positions that reliably “pinch” the hip, while keeping the rest of activity going:

• Temporarily reducing deep hip flexion work (deep squats, low seats, repeated knee‑to‑chest positions).
• Using shorter ranges for gym/lifting and avoiding repeated twisting under load.
• Building tolerance with targeted hip and core strengthening as part of a structured physiotherapy plan.

Over time, repeated impingement has been proposed to damage the acetabular labrum and the adjacent joint cartilage, and this mechanism is suggested as one route towards earlier hip osteoarthritis in otherwise non‑dysplastic hips. Hip preservation surgery aims to improve clearance for motion and address associated damage in selected cases, but it cannot guarantee that osteoarthritis will never develop.

When FAIS is suspected, a hip specialist assessment typically combines (1) a focused history about provoking positions and functional limits, (2) examination manoeuvres that reproduce impingement‑type pain, and (3) imaging chosen for the clinical question. X‑rays help assess hip joint shape, while MRI (or MR arthrogram in some pathways) may be used to look at the labrum and cartilage; scan findings are interpreted alongside symptoms because structural change in the hip joint is not always painful.

Management is usually conservative first, with rehab and activity modification forming the base. Where symptoms remain limiting, an image‑guided intra‑articular injection may be used to reduce pain and can help clarify whether symptoms are coming from inside the hip joint. If mechanical symptoms such as catching or “locking” are prominent, labral injury is often part of the same picture, which leads into the next section.

Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment when groin‑centred hip pain and stiffness are not settling.

Catching, locking or giving way in the hip joint

A hip joint that suddenly “catches”, feels momentarily “locked”, or briefly “gives way” (sometimes with a sharp jab of pain in the groin or front of the hip) often points to a problem inside the ball‑and‑socket joint rather than the tendons on the outside. These mechanical symptoms are commonly linked to the acetabular labrum—a ring of fibrocartilage attached to the rim of the socket that is commonly described as deepening the cup, helping maintain a suction/fluid seal, and contributing to hip stability and smoother load transfer.

Labral tears are frequently discussed alongside femoroacetabular impingement syndrome (FAIS), where altered hip shape can lead to repetitive contact that damages the labrum and adjacent cartilage. In published hip literature, labral tears are also described in association with acetabular cartilage delamination (cartilage “peeling” on the socket side), which can add to the sense of clicking, catching or a “blocked” movement.

Day to day, mechanical hip symptoms are often described in very specific moments, for example:

• A distinct click or clunk when rising from a low chair or getting out of a car.
• A brief stuck feeling in flexion/rotation that settles after rotating the leg or taking a few steps.
• A loss of confidence in pivoting sports (for example football) because the hip feels as if it might buckle.

When labral pathology is suspected, the clinical focus is less on a generic checklist and more on how well the story, examination and imaging fit together. The consultation typically centres on the exact positions that trigger the catch (for example flexion with rotation), followed by targeted hip range‑of‑motion and provocative tests used in FAIS/labral pathways. Imaging then answers specific questions: X‑ray helps assess bony shape and joint space; MRI (and in some pathways MR arthrogram) is used to look at the labrum and cartilage. In the wider MSK Doctors group, Open MRI is mainly relevant when a standard closed scanner is difficult to tolerate (for example because of claustrophobia), and motion analysis tools (such as MAI Motion / onMRI) may be considered when symptoms are most apparent during walking or running and decisions depend on what the hip is doing under load.

Importantly, a labral tear on a scan is not treated as a verdict on its own: FAIS guidance frames diagnosis around the combination of characteristic symptoms, clinical tests and targeted imaging, so management decisions are usually based on the overall match rather than the MRI report in isolation. Where symptoms are persistent and clearly intra‑articular, the pathway commonly starts with conservative rehabilitation; in selected cases an image‑guided intra‑articular injection may be used to support pain control or help clarify the pain source, and hip arthroscopy can be discussed as a joint‑preserving option when symptoms and imaging align.

A final practical distinction is that not every click is “internal”: so‑called snapping hip syndrome can produce audible popping from tendons moving over bony prominences around the hip, and this can be uncomfortable without the same true joint locking pattern. Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment, including appointments in Sleaford and Grantham, when catching or locking symptoms are not settling.

Snapping, clicking and soft‑tissue hip and groin pain

A click or “snap” around the hip during movement is common, particularly in younger, flexible or athletic people, and it often reflects soft tissues moving over bony points rather than damage inside the hip joint. Snapping hip syndrome is usually described as a snapping or popping sensation (sometimes audible) during hip flexion and extension, and it can be painless or painful. In many dancers and athletes it settles with rest and does not appear to harm the hip joint when it is painless and intermittent.

A useful way to decide whether a snap is likely to be benign or worth a more detailed work‑up is to separate how it feels from where it is felt:

• More reassuring pattern: painless snapping that is repeatable with one movement, with no catching/locking and no clear loss of hip joint motion.
• More concerning pattern: snapping that is painful, linked with catching or a sense of the leg “giving way”, or followed by a noticeable reduction in day‑to‑day function (for example difficulty with stairs or getting out of a car).
• Needs urgent medical assessment (UK health-service red flags): sudden severe hip pain, inability to weight‑bear, or a hot/swollen hip, or hip pain with systemic illness/high temperature.

Location then helps narrow the likely structure. External snapping is typically felt on the outer hip as tissue (often described as the iliotibial band or gluteal tendon region) moves over the bony prominence of the greater trochanter. Internal snapping is usually felt at the front of the hip joint, and is commonly linked to the iliopsoas tendon moving across the front of the joint. Intra‑articular snapping sits deeper and may occur with problems inside the hip joint such as labral tears or a loose body.

Not all “groin pain” is coming from the hip joint. A classic adductor‑related groin strain is a sharp or pulling pain along the inner thigh/groin, often after a sudden change of direction or overload in sport, with tenderness along the adductor muscle group (the main muscle compartment in the inguinal region). By contrast, proximal hamstring pain is usually high at the back of the thigh near the buttock crease, and clinical descriptions often emphasise a sudden sharp pain during exercise (sometimes with a “pop”), followed by tenderness and sometimes bruising.

Hip joint arthritis more often presents as a deeper groin ache with stiffness; UK health-service advice flags pain affecting sleep or normal activities, persistent/worsening symptoms, and prolonged morning stiffness as reasons to seek a GP review. In practice, even though research comparing individual hip tests is limited, a structured hip assessment usually combines the symptom map above with hip joint range‑of‑motion testing and targeted examination of the tender soft tissues.

Lincolnshire Hip focuses on identifying which structure is most likely involved first, then building a conservative‑first plan based on relative rest from the aggravating movement, a graded return to loading, and hip‑centred strengthening. Imaging (for example MRI) and image‑guided hip joint injections are usually reserved for symptoms that persist despite rehabilitation, or when the pattern suggests intra‑articular hip joint pathology. Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment, including appointments in Sleaford and Grantham.

Shallow sockets and serious causes of hip joint pain

Two situations tend to change the conversation from “sore hip” to “structural hip joint problem that benefits from being identified early”: a shallow socket (adult hip dysplasia) and a blood‑supply problem to the ball of the hip (avascular necrosis, AVN).

Shallow sockets (adult hip dysplasia)

In adult hip dysplasia, the acetabulum (socket) is shallow or mal‑orientated, so it does not fully cover the femoral head (ball). That under‑coverage is associated with instability and abnormal load distribution across the hip joint, which is one reason dysplasia is linked with earlier hip osteoarthritis and hip pain in some adults. Imaging papers on adult dysplasia focus on measurable features of coverage and orientation (for example the lateral centre‑edge angle and Tönnis angle) because subtle “borderline” shapes can still matter when symptoms fit the pattern.

Symptoms are often described as activity‑related deep groin pain, aching fatigue around the hip after longer walks, or a sense the hip is less reliable (sometimes described as “giving way”), even when the joint space on a plain X‑ray is not yet severely narrowed. In dysplastic hips, the altered mechanics can also increase stress on intra‑articular structures such as the labrum and cartilage, which can add mechanical symptoms to the pain picture.

A hip preservation assessment usually starts with careful history and examination, then standing pelvic X‑rays to quantify socket coverage and version. Depending on the question raised by the X‑ray and the symptoms, advanced imaging may be used to look for associated labral or cartilage injury and to plan whether the problem is mainly one of coverage, impingement, cartilage wear—or a mixture.

Treatment is typically staged: targeted physiotherapy to improve hip control, activity/load modification, and—where pain is limiting rehabilitation—an image‑guided intra‑articular injection may be used for symptom relief in selected cases. For some symptomatic adults with suitable joint surfaces, periacetabular osteotomy (PAO) can be considered to re‑orient the socket as a hip preservation procedure. A large systematic review (62 studies) found that adults undergoing PAO had substantially worse pain/function than healthy controls beforehand but showed meaningful improvements in pain, daily function and quality of life at 1–2 years; outcomes, however, were still typically not identical to having a completely normal hip joint.

Serious blood‑supply problems (avascular necrosis)

AVN (osteonecrosis) of the femoral head occurs when the blood supply to the bone is interrupted. Early AVN can be subtle or even asymptomatic, but progression is associated with hip joint pain and stiffness, and—if the bony surface collapses—secondary hip osteoarthritis.

Certain histories make AVN a “must‑not‑miss” cause of deep hip pain: significant hip trauma (including femoral neck fracture or hip dislocation) and non‑traumatic risks such as high‑dose/prolonged corticosteroid therapy or heavy alcohol use. Reviews emphasise that earlier (pre‑collapse) AVN is the stage where joint‑preserving options are most relevant, whereas more advanced collapse often shifts the pathway towards reconstructive surgery such as hip arthroplasty.

Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment, including clinics in Sleaford and Grantham, when a “shallow socket” has been mentioned on imaging or when deeper hip joint pain needs clarifying.

The practical takeaway is a simple next‑step framework:

• If X‑rays mention dysplasia/under‑coverage and symptoms are mainly load‑related groin pain or instability, the priority is a hip‑preservation style work‑up (standing pelvic X‑rays ± advanced imaging) to define mechanics and cartilage/labral involvement.
• If risk factors for AVN (trauma, corticosteroids, heavy alcohol) accompany unexplained deep hip joint pain, earlier MRI‑based clarification is often pivotal because the management window is different before collapse.
• If pain becomes sudden and severe or weight‑bearing rapidly deteriorates, that pattern sits outside “watch and wait” and warrants urgent clinical assessment to exclude serious hip joint pathology.

1. [1] Review of femoroacetabular impingement syndrome. (2024). https://doi.org/10.1093/jhps/hnae034 https://doi.org/10.1093/jhps/hnae034