Armpit yeast infections, caused by Candida, can lead to a red, itchy rash in the underarm area. Factors like hot weather, tight clothing, and poor hygiene contribute to their growth. Treatment involves antifungal creams, keeping the area clean and dry, and, in some cases, oral medications. Prevention includes maintaining good hygiene, using drying powders, and addressing underlying conditions like diabetes. While these infections are generally not contagious, individuals with weakened immune systems are at a higher risk. Babies can also develop armpit yeast infections, requiring prompt attention from healthcare providers. With proper care, these infections are treatable, and symptoms typically improve within two weeks.