Underarm rashes may be the result of an allergic reaction to a deodorant or antiperspirant. However, heat, fungal skin conditions as well as razor burn may be to blame too. A rash under the arm can be embarrassing as the urge to scratch may be unbearable. Treatment of underarm rashes varies depending on the nature of the rash.
Deodorant
If you have sensitive skin and get a rash under your arms when using deodorant, you may be allergic to an active ingredient. According to Discovery Health, all deodorants and antiperspirants contain an aluminum-based compound as their main ingredient along with wax and liquid emollients. A rash does not necessarily mean that you are allergic to the ingredients in the deodorant; you may just need to switch brands.
Heat
The underarm is a common place for rashes to occur due to the accumulation of heat buildup. Treatment for heat-induced rash is to wear loose-fitting clothing. If the rash persists once you have loosened your clothing, consult with your physician. There may be an underlying condition causing the rash.
Shaving
Shaving is a common cause of underarm rash and is sometimes referred to as razor burn. When shaving, the razor irritates the skin while sharpening the hairs, allowing them to pierce back into the skin. This leads to red bumps and rashes that may be painful. In addition, shaving with inadequate moisture or lubricant such as shaving cream may lead to skin irritation. Avoid shaving for a few days, allowing the rash time to heal. The next time you shave, use a shaving gel or cream as well as a new razor each time you shave to reduce the risk of underarm rashes.
Fungus
Fungal infections are common and may occur anywhere on the body. The medical term for this condition is tinea. Tinea is caused when species of fungi live on the outer layer of your skin. This can lead to severe itching and redness as well as inflammation of the skin. MayoClinic.com states that this type of fungus may interfere with skin pigmentation that results in small, discolored patches. Tinea is commonly treated with antifungal creams such as hydrocortisone cream. Remember to consult your physician if the problem persists or appears worse once you have applied the antifungal cream.
