Cutaneous candidiasis, or an armpit yeast infection, is a common fungal infection caused by an overgrowth of the Candida species of yeast. This organism naturally lives on the skin but thrives in warm, moist, and dark environments, making the armpit a prime location for overgrowth. The resulting infection is a form of intertrigo, a rash that occurs in skin folds. Treatment involves applying topical agents to clear the fungus and implementing lifestyle changes to control moisture.
Recognizing the Signs of an Armpit Yeast Infection
A candidiasis rash is typically intensely itchy and appears as a bright, fiery red patch located deep within the armpit fold. The rash often features a distinct border. A classic sign is the presence of “satellite lesions,” which are small, separate red spots or pustules surrounding the main rash area. The warm, moist conditions can sometimes produce a noticeable musty or yeasty odor.
Topical Treatments for Fungal Relief
The most direct way to combat fungal overgrowth is by applying over-the-counter (OTC) topical antifungal creams containing active ingredients like miconazole or clotrimazole, which work by disrupting the yeast cell wall. Apply the creams as a thin layer to the affected area, usually twice a day, after the skin has been thoroughly cleaned and dried.
Continue applying the antifungal cream for a full two weeks, even if visible symptoms clear sooner. Stopping treatment prematurely risks the return of the infection because not all the yeast cells may have been eliminated. After the cream has been absorbed, a non-medicated or antifungal drying powder can be dusted lightly onto the area. Cornstarch-free options are preferred.
If the rash does not respond to two weeks of OTC treatment, a healthcare provider may prescribe a stronger topical antifungal medication, such as ketoconazole. For severe, chronic, or widespread cases, the physician may prescribe an oral antifungal medication. These prescription options are reserved for when standard topical treatments are insufficient.
Managing Moisture and Preventing Recurrence
Controlling moisture is a necessary complement to antifungal medication, as Candida thrives in damp environments. After showering, gently pat the armpit area completely dry, avoiding harsh rubbing that can irritate the skin. Using a cool setting on a hairdryer can help ensure all residual dampness is removed from the skin folds.
Loose-fitting garments made from natural, breathable fibers like cotton are recommended to allow for better air circulation. Avoid synthetic or restrictive clothing, as these fabrics tend to trap heat and moisture against the skin.
For individuals who are overweight or have diabetes, managing these underlying conditions can reduce the risk of recurring armpit infections. Increased weight creates deeper moisture traps in skin folds, and high blood sugar levels make the body more susceptible to Candida overgrowth.
Signs That Require a Doctor’s Visit
While many armpit yeast infections respond well to home care and OTC antifungals, professional medical consultation is necessary if the rash shows no improvement, or worsens, after seven to ten days of consistent treatment. The rash might be caused by something other than yeast, or the fungal infection may be complicated by a secondary bacterial infection.
Signs of a secondary bacterial infection include increased pain, warmth, spreading redness, or the presence of pus or oozing. Individuals with compromised immune systems, such as those undergoing chemotherapy or with uncontrolled diabetes, should consult a healthcare provider immediately upon noticing any persistent rash.