The most common side effects of waxing include skin irritation, redness, and ingrown hairs. Proper aftercare can prevent side effects most of the time, however, it is possible for them to occur even if proper aftercare instructions are followed. Individuals with sensitive skin should proceed with caution if they are considering waxing treatments. It is always important to have the waxing treatment done by a reputable licensed aesthetician to reduce any chance of adverse effects.