Here's How to Transition From Antiperspirant to Natural Deodorant — the Right Way

When switching to natural deodorant, you change the pH level of the skin on your armpits, which can lead to bacterial growth and result in a yeast infection, acne, or a rash, explains Ilyas.

Excess moisture under your arms also contributes to chaffing. "If you start to feel that the area is raw and uncomfortable, use a little cortisone cream and an over-the-counter antiyeast cream for a couple of days," she says. If it doesn't get better, you may need to see your doctor.