A: Many of us experience darkness under our arms due to irritation from either the shaving process itself or the deodorant we use. Here’s the reality: the skin under our arms is delicate so it can be easily irritated. So let’s start with the shaving process itself. Are you using a shave cream or oil? It’s important because trying to remove the hair without it could cause additional irritation. If you don’t want yet another thing in your shower I would suggest picking up the Gillette Venus & Olay razor ($8-$10, drugstores) because it’s designed with moisturizers that combat the dryness that can come with shaving.