Paste it on. Mix lime juice, milk powder, and honey into a paste and apply to skin in underarms. Leave on for 15 minutes, then rinse thoroughly. After several weeks, your underarm skin will become whiter.
Change your hair-removal method. Stop using hair dissolving/removal agents and depilatory creams and you may notice your dark armpits getting lighter. These products contain strong acids and other substances to remove hair but can also darken the skin beneath.
Shave less. Shaving may also cause your armpits to darken, so shaving less frequently may help lighten them. Since shaving removes the top layer of skin along with the hair, the newly exposed layer can darken instantly when exposed to sweat. Try waxing underarms instead or using a sugar procedure to remove unwanted hair. It’s best to have your underarms waxed by a professional, as your skin is very sensitive in that area and can burn or bleed.
Loosen up. Tight blouses brush against armpit skin, and the friction can cause underarms to darken. Wear loose, breathable clothes instead.
Wash your underarms regularly. Poor hygiene can cause dirt and oil to accumulate in your armpits, which makes underarms dark. Wash well with soap, and rinse with warm water.
Use lightening creams sparingly . If you choose to use a bleaching cream, do it only on occasion to lighten skin under arms. Talk to your pharmacist, doctor, or aesthetician for guidance on purchasing a product that’s safe.
reference: Dailyglow.com & ehow.com
