Thigh pain may be caused by ligament strain, sciatica, femoral head necrosis and so on. 1. Ligament strain: If you perform strenuous exercise, such as sedentary, bicycle sitting, frog jumping, etc., it will lead to ligament strain, resulting in pain in the patient’s thighs, and at the same time the muscles will be tense, muscle stiffness, usually with the passage of time, this symptom will gradually disappear. 2. Sciatica: If the pain at the root of the thigh is a dull ache, or a burning or pins and needles pain, paroxysmal or persistent, it may be sciatica. 3. Necrosis of the femoral head: if there is pain in the inner thigh, we should pay attention to whether there is necrosis of the femoral head, usually in the early stage of necrosis of the femoral head, there will be pain in the inner thigh, and it will be accompanied by pain in the buttocks, inner thighs, knees and other parts of the body. The patient should pay attention to it, go to the hospital in time, and actively carry out symptomatic treatment after clarifying the specific cause.