Yeast infection under breast: what to know

The affected skin may be red or darker, shiny, moist, cracked or tender. Small spots around the main rash can occur. Heat, sweat, friction and a bra that holds moisture against the skin can encourage irritation. A similar rash may instead be contact dermatitis, eczema or a bacterial infection, so the location does not prove the cause. This condition is on the breast skin, not automatically a vaginal yeast infection; vaginal discharge, vaginal itching and vulval pain are different concerns.

Wash gently, rinse away cleanser and pat the fold dry rather than rubbing. Change out of sweaty clothing, wear a clean supportive bra that does not trap dampness, and allow the area to air when practical. Avoid talc, deodorant, perfume and home remedies on irritated or broken skin. A pharmacist or clinician can recommend an appropriate antifungal treatment if yeast is suspected. Follow the product directions and do not share treatment.

Seek care promptly for fever, increasing warmth, severe pain, pus, open sores, a fast-spreading rash or feeling unwell. Arrange an examination if it does not improve, returns often, or occurs alongside diabetes, pregnancy or reduced immune function. Breast changes such as a new lump, nipple discharge or a change in breast shape also deserve separate medical assessment.

You could ask whether the rash looks like yeast, how to keep the fold dry, whether your bra or skin products may be contributing, and when a swab or review is needed.