Home remedies for underarm odor include shaving the underarms, applying vinegar and applying witch hazel. Underarm odor is enhanced by sweating, so any remedy that prevents excessive sweating is also effective.
Underarm hair creates a moist environment in which bacteria thrive, and its porous nature means it absorbs odors easily and can slow down the evaporation of sweat. By shaving the underarms, bacteria is prevented from becoming trapped in the underarm area, which in turn reduces body odor.
Apple cider and white vinegar are effective in reducing odor by lowering the pH level of the skin, which results in a more anti-bacterial environment, since bacteria cannot spread in an acidic environment. However, vinegar can create a harmful skin reaction in some people, so it is best to try the mixture on a small patch of skin before applying it to the entire armpit.
Other natural substances that reduce underarm odor include witch hazel and tea tree oil. These substances are natural sterilizers and antiseptics that lower the skin's pH much like vinegar does. Directly apply witch hazel to underarm skin to receive its deodorizing effects. Wipe the underarm area clean of sweat at least four times a day to reduce odors further.