The underarm skin is more sensitive, so clipping it with a razor or causing a rub rash happens to the best of us, too. So if you do want to lighten underarm hyperpigmentation, we asked the experts for their best tips and tricks and why it happens in the first place. But remember: Nobody’s underarm skin is perfect, contrary to what you may see online. Skin color can affect hyperpigmentation as a whole—underarms included. “The theory is that POC melanocytes are more sensitive, and therefore any type of injury can cause post-inflammatory hyperpigmentation,” board-certified dermatologist Naana Boakye, M.D., MPH, tells mbg. The same goes for deodorant or antiperspirant. If you just started using a new product under your arms and a rash has followed, it’s probably due to an irritating ingredient. This could be fragrances, exfoliants, or just an allergic reaction. Waxing is another option but may cause more irritation to the underarm if it’s done too often or using too hot wax. In essence, waxing correctly in this delicate area can be more complicated, so if you choose to do so, proceed with caution. Some razors are specifically designed for sensitive skin—here are 11 top picks if you’re ready to make the switch. Here are natural deodorants free of baking soda if you’re on the hunt. Translation: Avoid using a derma roller on your underarms or crafting up a DIY peel on this sensitive patch of skin. This method may not provide instant results, but it is one safe path for those with sensitive skin. Opt for a simple niacinamide serum rather than a complex multi-ingredient blend. “Seeing a dermatologist is usually a good idea if it’s lasted more than a month or two,” Irwin reiterates.
