The main causes of pain in the back of the thigh are as follows: 1, after strenuous activity or when walking more, this condition generally does not require special treatment, rest can be improved, if necessary, local hot compresses. 2, after a fall on the buttocks can appear, this condition needs to go to the hospital for X-ray examination, except fractures. If there is no fracture, rest and activity should be reduced, and the symptoms will be relieved after local spraying of wound spirit spray or Yunnan Baiyao spray. 5. Local abscesses of the skin on the back side of the thigh can also be caused by this condition, which generally have local skin changes and can be easily detected.