Fat transfer and psoriasis?

You may already be aware that there is a thing called the "Koebner Phenomenon," named after Heinrich Koebner, and basically what happens is that at sites of trauma to the skin, like an incision or some other form of injury, the skin can develop a plaque of psoriasis.  Doctors don't really understand exactly how this works, but it is well described.  I don't think the psoriatic plaque near your areola has anything specifically to do with the fat transfer per se, but it could very well be the result of fat transfer to the breasts, especially if that area is one were a small incision or access point was made to inject the fat.  The fat should have been injected well deep to the skin where the topical medication should not reach, and the psoriasis mainly involves the skin, so you should be safe applying your topical medication to the area.  Check with your surgeon first too, just to make sure there aren't any other considerations.  Best of luck to you.