It depends which hair removal technique you compare waxing to. The biggest hassle is probably that you do have to grow the hair long enough to be able to wax it. Some negative results of waxing can be any of the following: bumps, pustules, ingrown hairs, lifted skin, histamine reactions, allergic reactions, torn skin, burns, bruising, irritation and discomfort. Many of these are prevented by proper technique, quality products and proper aftercare. Things such as histamine or allergic reactions cannot always be prevented or predicted though they are usually treatable.