I have it pretty bad in my left hip, got it from playing wayyyy to much golf (plant left foot and pivot at the hip). It flares up on both my bicycle and motorcycle, but not on the scooter. So I think it has to do with planting the left foot and pivoting while singing a leg over. *sigh*
Treatment so are over the last few years has been cortisone shots which didn't work, I've had them in my knee and shoulder previously and they worked great, no idea why they failed in the hip. And PT, icing, stretching. Those worked better than the shots, but still took forever to "fix" the issue.