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Did you know that the deodorant you apply might be the cause of your underarm rash? Jupiterimages/Pixland/ThinkstockThe armpit is a warm, damp environment, ideal for bacteria and other microbes to thrive. Some of these microbes produce unpleasant odors, which is why many people turn to deodorant. However, both the bacteria and deodorant can sometimes cause an adverse reaction, leading to a rash.
Rashes vary greatly in appearance – some are raised, dry, blotchy patches, while others may appear as red, itchy bumps or pimples. Some rashes are painful, others cause intense itching, and some may not bother you at all [source: Mayo Clinic].
Rest assured, an underarm rash is typically not due to poor hygiene. In fact, it might be triggered by the products you use to stay odor-free and hairless.
5: Razors Are Often the Culprit
Your underarms are sensitive for a reason: The skin there is delicate. While shaving is fine, take care—razors can cause irritation, nicks, or cuts, leading to inflammation, and the combination of deodorant or bacteria can worsen the situation.
Preventing a rash or infection from shaving your underarms is relatively easy. Use shaving cream for a smooth shave, and make slow, short strokes to minimize damage to the skin. If you shave at night, wait until the morning to apply deodorant to avoid aggravating the skin further [source: Prevention Magazine Health Books PLEASE LINK TO LMI].
4: Temperature Can Affect Your Skin
Heat rash occurs when sweat ducts become blocked, leading to a buildup of perspiration beneath the skin. This causes bumpy and sometimes painful inflammation. While the exact cause of blocked sweat ducts isn't always clear, factors such as bacteria, tight clothing, medications, and certain fabrics can contribute to the condition [source: Mayo Clinic].
Understanding the causes of underarm rashes is key to preventing them. To avoid heat rash, try to stay out of hot, humid environments. If you must be outside, avoid overexerting yourself and opt for loose-fitting clothing made of breathable fabric. Also, avoid using powders, creams, or ointments on your skin, as they can clog pores and disrupt normal perspiration [source: Mayo Clinic].
3: Friction Is Not Your Friend
Friction can also lead to skin irritation in the underarms—this area is prone to constant rubbing against fabric or other skin. When friction, heat, and moisture combine, they break down the epidermis, causing inflammation. Though painful in itself, the issue can worsen if bacteria or fungus infect the damaged skin [source: Selden].
A specific infection that may arise in this situation is candidiasis, also known as a yeast infection [source: WebMD]. The same preventive measures for friction rashes apply to heat rash: Keep your underarms dry and wear light, loose-fitting clothing to minimize risk.
2: Watch Out for Allergens
Contact dermatitis is a common cause of skin irritation, including in the underarm area. As the name suggests, contact dermatitis occurs when something irritates your skin or causes a reaction, resulting in a rash.
If you think that skin care products or household chemicals are to blame for your rash, the best way to prevent contact dermatitis is to pinpoint the problematic product and stop using it. If your symptoms persist or you're unable to identify the cause, consult a doctor, who can test for specific allergies [source: Mayo Clinic].
It may take some trial and error to figure out what's causing your rash, but it's a good idea to start by reviewing your deodorant. Other potential culprits include laundry detergent, soap, shampoo, and lotions.
1: Relief is Within Reach
While most rashes tend to clear up naturally within a few weeks, that time can feel endless if you're dealing with an itchy or painful rash. Thankfully, there are ways to find quick relief.
If the rash isn't too severe or infected, the key is to alleviate the irritation. Calamine lotion is a popular remedy, but you could also apply hydrocortisone cream or take an antihistamine. A soothing oatmeal bath can help calm the skin and ease itching, and if the rash is causing discomfort, ibuprofen or aspirin can reduce pain and inflammation.
While scratching an itchy rash might feel relieving in the moment, it can make the situation worse by irritating the skin further, potentially leading to infection or scarring. Instead of scratching, place a damp cloth on the rash for relief, and feel free to repeat this as needed [source: Mayo Clinic].
