If the patient has thigh root cramps and pain, the causes include inguinal ligament strain, femoral head necrosis, buttock muscle strain, pyriform muscle syndrome, etc. The details are as follows: First, inguinal ligament strain: it is easy to cause thigh root cramps and pain. Necrosis of the femoral head: especially after the necrosis of the femoral head, which triggers the necrosis of the bone under the cartilage surface of the femoral head and the cystic change, it is easy to lead to cramps and pain at the root of the thigh. Hip muscle strain: it can also lead to thigh cramps and pain. Piriformis syndrome: cramps and pain at the base of the thigh can also occur during acute attacks. So after a patient develops thigh root cramps and pain, it is important to consult a doctor to see what triggers it. For the cause of the treatment, to promote the thigh root cramps, pain symptoms and recovery, in order to restore the lower limbs of the normal force activities.