Butt pain and calf leg swelling after a fall may be caused by soft tissue contusion, sciatic nerve injury, and fracture. 1. Soft tissue contusion: soft tissue contusion after a fall can cause buttock pain and calf swelling. 2. Sciatic nerve injury: A fall can lead to sciatic nerve injury, which can cause buttock pain. If it is accompanied by soft tissue contusion in the calf, calf swelling can also occur. Sciatica is characterized by pain along the distribution area of the sciatic nerve, the back of the thigh, the back and outer side of the calf and the foot when the pain is intense, and aggravated with coughing and exertion. 3. Fracture: especially the elderly, osteoporosis patients, very easy because of the fall fracture, which causes buttock pain and calf leg swelling and so on. After a fall pain in the buttocks and calf swelling, it is recommended to consult a doctor in time to find out the cause of the problem and treat the cause without delay.