Should I go to a plastic surgeon or dermatologist to remove some keloids?

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  It is more important that you find a physician who can manage all aspects of your keloid care rather than simply what their specialty training is.  However, if you need a surgical excision and closure of your keloid, this should be performed by a plastic surgeon, who is board-certified by the American Board of Plastic Surgery.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a scar expert you are comfortable with. I recommend
that you seek consultation with a qualified board-certified expert who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon

Scarring these days can be minimized in multiple ways. Different specialties can be equally beneficial to help you.
Choose an expert. Best. Dr Brecht
Seattle, Wa