There are many good resources on how to lightened the dark patch in the underarms. Many articles claimed that by rubbing lemon juice will help but according to dermatologists, this may do more harm.
There is an option of using coconut oil to get rid of dark underarms. Coconut oil contains vitamin E that can help lighten the underarms. Just massage the area with coconut oil and leave it on for 10 to 15 minutes. Wash off with mild soap and lukewarm water. Repeat these steps 2 or 3 times daily until result is achieved.
A good way is to use baking soda mix with water to make a thick paste. Then scrub the underarm with the paste and wash it off. Pat dry thoroughly. Repeat this method a few times a week.
Try these simple home remedies to whiten the underams.