Doctor's Answers (1)
There is darkening of the skin follicles in the armpit region. I would then ask if you remove the armpit hair regularly and whether you get irritation or infection of the follicles of the skin after removal.
If that is the case, it could be a case of darkening of the skin secondary to inflammation from the hair removal process - called post-inflammatory hyperpigmentation.
I hope you have found this useful.
Dr Benjamin Yim Fu Chuen