My underarms are really dark and i have two or more hairs growing from the same follicle, is there any way to lighten my armpits and reduce hairgrowth. the skin there is also bumpy and uneven and sometimes resembles pimples where the follicles are.

Acanthosis: If the skin in your "underarms" is significantly different (darker, "velvety" in texture = bumpy) then you should see your physician for evaluation. This type of skin change in the neck folds and in the axilla can be indicative of a more serious health issue and needs proper eval. Your doctor can then refer you, if needed, to the proper specialist.