How Do You Whiten Dark Underarms Due to Deodorant Burn?

Begin with Melapads and Melarase PM for light pigmentation. If the pigmentation is severe in the armpits, opt for the Body Brightening kit followed by Clear and Brilliant lasers. Best, Dr. KaramanoukianLos Angeles

I would recommend that you see a board-certified dermatologist before you seek treatment. A condition called acanthosis nigricans commonly presents as darkening of the armpit skin. Acanthosis nigricans may be genetic, or associated with obesity, diabetes or other thyroid disease or even cancer. A dermatologist will make a dagnosis and suggest appropriate treatment.

This can be a difficult problem to treat. The best approach would be to see a dermatologist to determine true cause ie genetic predisposition versus external contact with post inflammatory hyperpigmentation. There are bleaching creams that may be tried under physician supervision and by prescription.