Sciatica is a cause of pain under the buttox and radiating into leg. Pain is for short time of a day or continues all day. Normally patients think that It usually goes in time. But it is not easy like that for some professional drivers with hip bursitis. So he finally visits me with more than 2 years chronic pains after all the trials that they could. Also he had pains in additional area. From my experience it takes less than 15 sessions to heal.