Hip pain is discomfort felt around the hip joint or nearby areas such as the groin, outer hip, buttock, or upper thigh. It is a symptom, not a diagnosis, and it can come from bone, cartilage, tendon, muscle, nerve, or referred sources. Hip pain is commonly discussed in primary care, orthopedics, sports medicine, rheumatology, and physical therapy. Clinicians use the pattern of Hip pain to guide examination, imaging choices, and a working diagnosis.

Hip osteoarthritis is a common joint condition where the hip’s smooth cartilage gradually wears and the joint becomes mechanically less efficient. It can cause pain, stiffness, and reduced hip motion that may affect walking, stairs, and daily tasks. Clinicians use the term to describe a specific pattern of hip joint degeneration seen on exam and imaging. It is discussed in primary care, orthopedics, sports medicine, rheumatology, and physical therapy settings.

Hip MRI is an imaging test that creates detailed pictures of the hip joint and surrounding soft tissues. It uses a magnetic field and radio waves rather than ionizing radiation. Clinicians use it to evaluate hip pain, injuries, and suspected joint or soft-tissue problems. It is commonly ordered in orthopedics, sports medicine, and musculoskeletal radiology.

Hip mobility describes how freely the hip joint moves through its normal ranges. It includes both flexibility (muscle and soft-tissue length) and joint motion (how the joint itself glides and rotates). Hip mobility is commonly discussed in orthopedic care, sports medicine, and physical therapy. It is also a frequent focus in rehabilitation after injury or surgery and in athletic training.

The Hip labrum is a ring of tough cartilage that lines the rim of the hip socket. It helps the ball-and-socket hip joint fit together and move smoothly. Clinicians commonly discuss it when evaluating groin pain, clicking, or hip instability. It is also a key structure in hip imaging and hip arthroscopy (minimally invasive hip surgery).

Hip labral tear is a condition where the hip labrum is damaged or frayed. The labrum is a ring of cartilage that lines the rim of the hip socket. It is commonly discussed in sports medicine, orthopedics, and physical therapy when evaluating hip and groin pain. It can be found in active people, but it can also occur with age-related joint changes.

Hip joint space is the gap between the ball of the femur and the socket of the pelvis. On imaging, it represents where joint cartilage and a thin layer of fluid allow smooth motion. Clinicians most often discuss Hip joint space when assessing arthritis, impingement, or hip injury. It is commonly reported on hip and pelvis X-rays, and sometimes considered alongside MRI findings.

Hip joint inflammation is a broad clinical term for swelling and irritation in or around the hip joint. It commonly refers to inflammation of the joint lining (synovium), joint capsule, or nearby soft tissues. It is used in orthopedics, sports medicine, and physical therapy when hip pain is suspected to have an inflammatory component. It can describe a temporary reaction to overuse or a feature of arthritis, injury, or infection.

Hip joint infection is an infection inside the hip joint space, sometimes called septic arthritis of the hip. It means germs (most often bacteria) are present in the joint and trigger inflammation. It is commonly discussed in emergency care, orthopedics, infectious disease, and post-surgical follow-up. It can involve a natural (native) hip joint or a hip replacement (prosthetic joint).

Hip joint effusion means extra fluid has collected inside the hip joint capsule. It is a clinical finding rather than a diagnosis by itself. Clinicians commonly discuss it when evaluating hip pain, limping, injury, or infection concerns. It is most often identified with imaging such as ultrasound or MRI.