Pain in the thigh root tendon is commonly caused by the following reasons: First, trauma: often perform postures such as splitting or riding across, which can easily cause damage to the medial thigh muscle at the root of the thigh, and therefore pain in the medial thigh root can occur. Second, deep vein thrombosis of the lower limbs: often accompanied by swelling and pain of the lower limbs, the pain can continue to the root of the thigh. Third, hip joint diseases: such as hip synovitis, etc., can be accompanied by pain and soreness at the root of the thigh or hip joint area, and osteoarthritis of the hip joint can also appear as chronic pain at the hip and thigh root. In addition, when femoral head necrosis occurs, pain can occur deep in the midpoint of the groin, and the pain in this region is also close to the level of pain at the root of the thigh.