The side effects are minimal. This is one of the primary benefits of laser hair removal. Some people experience temporary redness, itching, and swelling of the skin right after treatment. These side effects usually go away within a few hours, and most can be soothed by applying aloe vera to the treated area. In rare cases, some people may see scars, burns, or blisters. But these side effects usually occur only in people who do not follow the proper aftercare plan.