Lower back and buttock pain

Patient: I have recectly been feelin discomfort in my lower back and buttock area. it most likely happened playing golf. It is not overly sore and i can still manage to play golf but it gets worse from time to time and the simplest thing like bending over to put on my shoes or sittin down can be very painful. intially i thought it was a hip injury from golf and it seems to be more in my back lately. any ideas? thanks