One major problem people of colour/hairy people face are the very stubborn dark under arms. These dark spots are usually caused by constant friction which is caused by constant shaving/waxing.
Worry no more as there is a simple solution for this and it is not expensive. Simply use the same facial pads that are prescribed for acne/blackheads to wipe your underarms which will gradually lighten up with constant use. Just make sure the pads contain either Salicylic/Glycolic/Kojic Acid.