What is a trichloracetic acid (TCA) peel?
TCA is the main component used in the popular The Obagi Blue Peel. TCA peels help to correct fine lines, superficial scars, and pigmentation problems. It is beneficial to persons of all skin types. Concentrations higher than 35% are not recommended because of the high risk of scarring. TCA is a keratocoagulant that produces a frost or whitening of the skin, which is dependent on the concentration used. Vigorous rubbing of the agent, as compared to blotting, yields a deeper penetration. This technique is not time dependent, and the agent does not require neutralization. TCA application is associated with an intense burning that usually resolves within 30 minutes. Comfort may be improved by having a fan to cool the face and by applying sponges soaked in iced saline prior to moving from one facial region to another. The application of topical lidocaine 4% immediately following the peel decreases the burning sensation and increases comfort. Once completed, exfoliation proceeds for several
