Thigh joint pain may be caused by acute injury, degenerative osteoarthritis, gouty arthritis, rheumatoid arthritis, bone tumor and other factors. 1. Acute injury: for example, the joint area suffered an external blow, resulting in acute damage to the joint area, which will cause joint pain, pain is more intense, accompanied by swelling and limited movement. 2. Degenerative osteoarthritis: with age, degenerative changes will occur in the joints, due to long-term exertion, wear and tear easily caused by aseptic inflammation, which can cause joint pain. 3. Gouty arthritis: it may be related to the abnormal uric acid metabolism level in the body, which can lead to joint pain in acute attack, and may be accompanied by redness, swelling, localized fever and other symptoms. 4. Rheumatoid arthritis: it may be related to heredity, infection and other factors, when invading the joints of the lower limbs, it will lead to joint pain in the lower limbs, which may be accompanied by morning stiffness, joint swelling, and in severe cases, it will lead to joint deformity and joint dysfunction. 5. Bone tumors: when the lower limb joints exist bone tumors, may cause damage to the joints, it is easy to cause joint pain, the local will also appear obvious swelling. Thigh joint pain indicates the existence of abnormal conditions, it is recommended to consult a doctor for a detailed examination, clear the cause of the disease and then timely treatment, to avoid the continued aggravation of the lesion.