Heat rash between thighs: what to know

Affected thigh surfaces may sting, itch or feel tender, especially after walking or exercise. You may see tiny raised spots, a diffuse rash or colour change. On black or brown skin, inflammation is not always bright red and may appear darker, violaceous or grey. Other problems, such as chafing, eczema or infection, can resemble heat rash, so persistence deserves a proper assessment.

After washing, pat the inner thighs completely dry and allow air to reach the area. Wear breathable clothing with enough room to limit skin-on-skin rubbing, and replace sweaty garments. Skip perfumed products and abrasive exfoliation while the skin is irritated. For dryness, a bland product may be useful; learn more about [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/). A clinician should guide any steroid use in this location; [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) are not suitable for every rash.

Contact a clinician when the area becomes increasingly painful, hot, swollen, cracked, wet or foul-smelling, or when bumps contain pus. Fever, fast spread or red streaking calls for prompt care. Arrange a review if simple cooling and drying fail to improve the rash or if it repeatedly returns.

Does the appearance fit heat rash, chafing or infection? How should I protect the skin during walking or sport? Is a moisturiser appropriate here? If a medicine is prescribed, where exactly should it be applied and for how long?