Intertrigo sweat rash: causes and care

Sweat increases dampness and softens the outer skin. Movement then creates friction, which may cause a red, sore or itchy patch in the groin, under the breast, between the buttocks or another fold. Heat, exercise, tight clothing and prolonged skin contact can intensify it. Yeast or bacteria can grow more easily when the protective surface is cracked, so a change to drainage, odour or pain deserves attention.

After sweating, rinse or wash gently and dry every crease by patting. Change wet clothing promptly and choose breathable fabrics that do not press into the fold. During activity, take cooling breaks and reduce repeated rubbing where possible. Avoid scented powders and aggressive scrubbing. If sweating remains a major trigger, ask a clinician whether Prescription Antiperspirant is suitable; do not apply it to raw or broken skin unless advised.

Seek medical advice if the rash persists after moisture control, returns frequently or affects daily activity. Get prompt care for rapidly spreading redness, pus, marked warmth, severe tenderness, fever or feeling unwell. A clinician can check for yeast, bacterial infection, eczema, psoriasis or contact irritation and match treatment to the finding.

Which fold-care routine fits my skin? Is sweat the main trigger, or is there an infection? When can I restart exercise, and which antiperspirant or barrier product is appropriate?