I used tretinoin 0.025% on my face including the eye area. After around 4 weeks my under eye shadows became much worse (I already had dark shadows from naturally thin skin) and I now have awful bags under my eyes which I didn't have before. It looks as if I have lost subcutaneous fat and/or the skin has thinned. Is this a typical side effect of tretinoin and now I've stopped using it are the dark shadows and bags likely to improve? Thanks so much for your advice, it's much appreciated .