Photodynamic Therapy (PDT) or blue light is used to treat Actinic Keratosis(Aks). Aks are rough-textured, dry, scaly patches that are caused by excessive exposure to ultraviolet light such as sunlight. Aks typically occur on the face, scalp, ears, neck, hands and arms. This treatment requires that you are in our office for at least 2 hours. When you first arrive a nurse will cleanse your skin with acetone to remove the natural oils and then a medication called Levulan is applied to the treatment area. We allow that medication to be absorbed for 90 minutes. Once the incubation time period has elapsed you will be placed under a low intensity light for approximately 17 minutes. This light does not heat the skin; however, during the treatment you may experience sensations of burning, stinging and tingling. Over the next 2-3 days following the treatment you will notice increased redness, swelling and burning, similar to a moderate to severe sunburn. We do ask that during this time you avoid the sunlight and bright indoor lights. After approximately a week you will notice that your skin feels much smoother and that many of the Aks have resolved.