I had the same and the physio did help luckily, but the most useful thing the physiotherapist showed me was how to lean on a tennis ball to alleviate the pain. Best if your friend can get their physio to show them exactly how to do this. Basically though, get a normal tennis ball, place it directly over the bit that hurts and lean back against the wall. If you get it right it hurts like hell to start with, then the pressure of the ball releases the tension and it gives a lot of relief. You need to lean on the ball for about 5 minutes, several times a day.