The Top Acne Causes, and What to Do About Them

Especially for people with sensitive skin, allergic reactions to things like your laundry detergent and dryer sheets can lead to pimples. Some people even develop contact dermatitis and mistake it for acne. Swap your usual soap for fragrance-free detergent, skip the dryer sheets, and this could clear things up.

Similarly, if you break out around the corners of your mouth, your toothpaste is the likely culprit. And that old tip about using toothpaste to heal a pimple? It's a myth.