Pictures of underarm skin rashes can be found on HowStuffWorks, Prime Health Channel and Rash Resource. Underarm skin rashes can have a variety of causes, from skin disorders and infections to contact with poisonous plants or allergens, explains Health Grades.
Underarm rashes often occur because fungi and bacterial thrive in the moist, dark, enclosed places of the skin, such as the armpit, states HowStuffWorks. Many are self-resolving or require a simple change in deodorant or soap. Other underarm rashes are caused by heat and friction. When suffering from an underarm rash, an individual needs to avoid scratching it. This can irritate or infect the skin. Instead, a person should work calamine lotion or hydrocortisone cream into the affected area. Taking an oatmeal bath can also relieve symptoms.
If the rash is from an allergic reaction, the allergen should be removed whether it is a certain brand of deodorant or soap or a specific type of fiber, according to HowStuffWorks. An antihistamine can help to relieve symptoms and reduce itching. If an underarm rash is accompanied by joint pain, fever, unconsciousness and chills, the individual should receive emergency medical care immediately as these symptoms can denote a serious health problem, explains Health Grades.