I am also 41-years old and have been experiencing something terrible from aggressive exfoliation, plus improper use of Retin-A. For 4 weeks now I've been experiencing a burning, throbbing, irritating, hypersensitive feeling on the skin in my face. This all started on March 16, 2009, in trying to help some very mild acne/pimples and dull skin, I aggressively exfoliated my entire face, scrubbing hard with a coarse scrub sponge, using that with crushed Apricot Seed Scrub.