How can i prevent a rebound affect after using topical steroids?

Short term use: If you use a topical steroid for a short period of time 1-2 weeks, you should have no problem. For someone with a chronic history of topical steroids, more than a month a few times each day, try slowly stopping called "tapering" off the medicine. Decrease to once a day for two weeks, then every other day for a few weeks, then you should be able to stop with no problem.

Need more info: How do you define rebound? Is it simply that the rash returns when you stop it? Why are you using it in the first place? Which topical are you using and how long have you been using it? Without this info your question cannot be answered.