Pigment changes (light or dark spots on the skin) lasting 1 to 6 months, and freckles may temporarily or permanently disappear in treated area. Other potential risk includes crusting, itching, pain, bruising, pimple like bumps, dry skin, Hypopigmentation (lightening of the skin) hyper pigmentation (darkening of the skin) blistering, burns infection, scabbing, swelling, a very small risk of scarring and failure to achieve the desired results.*