Hip joint involvement is standardized by pain, swelling and limited movement. Hip joint involvement can be caused by a variety of conditions, such as trauma leading to hip dislocation or fracture or inflammation caused by hip infection, or degenerative hip joint disease caused by long-term excessive friction, as well as allergic reactions and autoimmune diseases leading to joint involvement. 1. Hip pain: the pain site is located in the groin area at the level of the lateral femoral greater trochanter, or the inner side of the buttocks. The pain mostly occurs during hip activities. 2. Swelling: It is manifested as swelling in the painful area according to insufficient pain. 3. Activity limitation: it can be manifested as the limitation of external rotation, abduction, flexion, extension, internal retraction and other movements, even affecting walking. 4. Other: secondary lumbar pain or leg and knee pain. If you have hip discomfort, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment.