Is there a procedure that can remove under arm chicken skin/keratosis pilaris?

Thank you for your question. I suggest that you consult with your board certified facial plastic surgeon.
Best wishes,

Keratosis Pilaris is a chronic condition that you can improve using skin exfoliants like urea, glycolic acid and good moisturizers. It is an ongoing process that you need to maintain, it tends to improve but can be recurrent.