Sometimes when we train a certain muscle group we experience some pain that qualifies that body part to be less then 100%.....there are many ways to deal with it, sometimes an anti inflammatory works, time off, medical attention but here's something you can try. Do all of your accessory work first prior to your compound movements. This way by the time you get to your compound movement/s you are totally warmed up and there is plenty of blood flow occurring. I recently tried this approach after tweaking my hamstring and would only really feel it at the very bottom of my squat. This injury/trauma most likely occurred from totally bottoming out with my squat which is a few inches (if that ) more them I was used to. The point is that you could apply this to any nagging injury and have a more pain free workout. Your poundages won't be where they usually are but your workouts will be productive and you will put yourself at less risk. Try it!