All products have a potential for allergic reactions. It is important that you inform the nurse of any allergies they may have. Transient reactions may include redness to the skin, itchiness, dryness and in some cases swelling. It is common for most patients to experience transient hyperpigmentation. This will settle during the course of treatments and with use of the appropriate treatment creams and sun protection (SPF30+). Although very rare, there may be in some cases risk of superficial blistering, hyperpigmentation, hypopigmentation.