Sore buttocks may hip muscle strain, hip synovitis, lumbar disc herniation, sciatica. 1. Muscle strain: may be usually sit for a long time or often do stilt action, will cause fatigue of the hip muscles, time will appear muscle strain symptoms of soreness, this symptom by resting massage, the symptoms can be reduced. 2. Hip synovitis: usually caused by trauma or strenuous exercise, there is fluid in the hip joint that stimulates the muscles around the buttocks with symptoms of pain and soreness, which can be clearly diagnosed through MRI films. 3. Lumbar disc herniation: the herniated disc compresses the nerves and can radiate to the pain in the buttocks and legs, which can be clearly diagnosed through lumbar MRI films. 4. Sciatica: common causes of buttock pain due to compression by pyriformis syndrome, sciatic neuritis, trauma and other causes. Hip pain generally consider the above reasons, if the symptoms seriously affect walking, or hip pain persists unrelieved, go to the hospital in time to check to avoid aggravation of the condition.