Heat a low-temperature wax in accordance with the product guidelines. This could mean heating it in the microwave or in a pot of water on the stove. Low-temperature waxes are a must for facial waxing because the skin on your face is more sensitive and prone to burning than the skin on your legs.
Apply the wax to the left side of your upper lip. Smooth a facial waxing strip onto the wax, then hold the skin taut and pull the strip off in the opposite direction of hair growth. Repeat with the right side and the center of your upper lip.
Remove any stragglers with tweezers. Rub some gentle moisturizer into your lip and stay out of sight for two or three hours until the redness fades.
Rub a skin-lightening cream containing hydroquinone, tretinoin, corticosteroids or glycolic acid over your upper lip every day. Over time, the active ingredients will even out your skin tone and get rid of the dark mark from your upper lip.
Apply a couple of drops of plant extract to your upper lip. Extracts, such as bearberry, mulberry, white mulberry and paper mulberry contain arbutin, a natural alternative to hydroquinone. Other skin-lightening plant extracts include pomegranate, turmeric and licorice.
Grind a Chinese hawthorn fruit into a fine powder and mix in enough egg white to make a paste. Spread a thin layer of paste onto your upper lip and keep it on for one hour, massaging regularly. Do this in the morning and before bed for 30 days to lighten your upper lip the natural way.
Exfoliate your upper lip daily after waxing to prevent ingrown hairs. Use a facial scrub, and moisturize thoroughly afterward.
Use sunscreen daily to prevent dark spots from appearing on your face. Slather on SPF 30 or higher, even if it's the middle of winter and you're outside for a total of 10 minutes. Skin prone to melasma only needs a little sunlight to trigger a reaction.
Hydroquinone can cause permanent blue-black stains on the skin of certain people. It's also been linked to cancer in rats and mice, though no link to human cancer has been discovered, reports "Allure." Read the side effects carefully before using this, or any other chemical product on your skin.