Armpit yeast infection, caused by Candida overgrowth, leads to a red, itchy rash in the underarm area. It can be triggered by factors like hot weather, tight clothing, and poor hygiene. Diagnosis involves a healthcare provider’s examination and possible testing. Treatment includes antifungal creams or oral medications, along with maintaining cleanliness and dryness. Preventive measures include using drying powders, antiperspirants, and overall hygiene. The outlook is positive with proper treatment, but recurrence may happen without consistent prevention. Babies can also develop these infections. If symptoms persist, consult a healthcare provider for accurate diagnosis and treatment options.