Does hydrocortisone cream 1% affect transplanted hairs?

Hydrocortisone cream will not affect the transplanted hair as long as you use it as directed.

I don't think it will affect you this far out from FUE transplant, but I would try to find a HCT cream with minimal chemicals/preservatives so as not to bath the new follicles in toxins.  I would also only use for a short period of time as you did.  Best of luck,  Dr. Giordano

A mild hydrocortisone cream used for a limited amount of time is an acceptable treatment for scalp redness. Used in this way, it should not have any negative effects on the growth of your hair, and there is no existing proof that it does.