There are several possible causes of medial thigh knee pain: first, goosefoot inflammation, goosefoot inflammation can appear in the medial knee goosefoot pain, the pain is particularly obvious when exertion, cold, early physical examination for diagnosis, early closed treatment, and physical therapy, most patients can have good results. Second, sprains of the medial collateral ligament, when there is a sprain of the medial collateral ligament of the knee joint, there can also be pain on the inside of the knee, so it is important to take a medical history and perform an MRI for early diagnosis and treatment. Third, injury to the meniscus. When the medial meniscus of the knee is damaged or torn, pain in the medial thigh can occur, and MRI of the meniscus should be performed for early diagnosis. Fourth, osteoarthritis of the knee joint, osteoarthritis of the knee joint can involve the soft tissues around the knee joint, resulting in pain in the inner knee.