Lower back pain that spread to other areas of the back

My friend and I were working out in the gym. He started rowing but dropped the dumbbell saying he felt something in the lower back. The pain increased the next day after he did Sarvangasana (Shoulder Stand) and the pain started spreading to other areas of the back. He went to a Physio that told him its a Muscle Pull and suggested MRT (some matrix tool). Around 4-5 session will cure it. He took 2 sesseions but it provided him temporary relief so he changed to another Physio. This new Physio helps him with stretchs and exercises but he says sitting cross legged and sleeping during night increases his pain. Its been more than 2 weeks. He has stopped training completely not even pushups. What can be done? Should he try another Physio?