What causes intertrigo?

The rubbing surfaces may include the underarms, groin, under the breasts, abdomen, inner thighs, or between the toes. Moisture softens the outer skin, while repeated rubbing creates inflammation. Tight clothing, hot weather, exercise, limited airflow, and hyperhidrosis can maintain the cycle. Once the skin barrier is damaged, yeast or bacteria may grow in the area and change the rash’s appearance.

Intertrigo may look red, sore, raw, cracked, or moist. A strong odour, small surrounding spots, pus, or worsening tenderness can suggest an additional infection rather than simple friction alone.

Gently wash the fold and pat it completely dry; rubbing can further irritate the surface. Choose breathable, loose clothing, change damp garments promptly, and take breaks from activities that cause repeated chafing while the rash is active. A clean, dry layer of fabric can separate touching surfaces. Avoid fragranced products or harsh antiseptics unless a clinician recommends them.

A clinician can check for yeast or bacterial involvement and recommend the appropriate topical treatment. Keeping the fold dry helps treatment work, but an unexplained or persistent rash should not be treated indefinitely with leftover creams.

Book an appointment if the rash is persistent, frequently returns, spreads beyond the fold, cracks, or interferes with movement. Seek prompt care if you notice rapidly expanding redness, marked warmth, pus, severe pain, fever, or a foul smell, particularly if you have diabetes or a weakened immune system.

Ask what is driving the rash, whether yeast or bacteria are involved, which drying and clothing measures suit the affected fold, and how to manage heavy sweating if it keeps triggering symptoms.