Its very common with topicals. Sometimes if you stick it out, it will get better. Are you on Differin cream or gel? Cream is gentler. If you're getting anything really bad like scaling you should stop use and call your derm. But a little redness and peeling is very common.

It's the Differin gel. My skin is pretty red, but it's also dry in the spots I applied the Differin. I think my best bet is probably to stop using them. Or maybe I could see how the cream works. Do you think retin A would be better? I hear that's good for acne.