I've been dealing with this shit on and off for about 15 years...
To some extent, I will train through it. It really depends on how bad it is and how much flexibility I lose as a result of aggravating it.
As long as I keep strict effing form it responds positively. There is a balance here that you will have to learn (duh squared) and is individual (imo). Some light weight work is good (RDL seems to help loosen that shit up) as well as stretching regularly through the day.
I've found that DL and Clean variations are my biggest danger areas (with some other random crap of course). As a result, I've not progresses as much as I would like on DL, but then again, I've been able to train pretty continuously for a while too.
Best suggestion? Be smart and listen to your body and don't get too greedy about progress.