It might be useful if you can identify any activities that aggravate it and then limit or modify those activities. I have a problem with L5-S1 (the lowest one, below L4-L5) which is aggravated by forward-bending stretches such as pike. If I do too much forward bending, my back will be sore the next day and it also causes problems with my right foot. I now try to avoid or limit forward-bending stretches and modify some of my stretching, for example I usually stretch the hamstrings by lying on my back and raising my leg, rather than sitting down and leaning forward over the leg. I don't have problems with arching my back, but everyone is different, for some people it can be arching that causes problems. One time I really hurt my back when I had been practising a lot of round-offs onto a relatively firm mat, so it might also help if you can use soft landing mats when practising high-impact activities repetitively.