What should you know about hormonal body odour?

Sweat itself has little smell. Odour develops when skin bacteria break down sweat and other substances on the skin. Puberty, menstrual-cycle changes, pregnancy, menopause, stress, or some medicines can alter sweating, skin moisture, and odour. Heat, tight clothing, diet, and washing habits can also contribute. Odour may be strongest in the underarms, groin, feet, or skin folds. Read more about [Body Odour](/symptoms/body-odour/).

Wash and dry areas that sweat, change damp clothing, choose breathable fabrics, and avoid applying fragranced products to irritated or broken skin. An antiperspirant reduces sweat reaching the skin, while deodorant mainly masks or limits odour. A clinician can recommend [Prescription Antiperspirant](/treatments/medical-dermatology/prescription-antiperspirant/) when non-prescription products are inadequate. [Botox For Sweating](/treatments/injectables/botulinum-toxin-for-hyperhidrosis/) may be discussed for troublesome local sweating after assessment.

Arrange a medical review if odour changes suddenly, persists despite careful washing, or comes with excessive sweating, fever, weight change, skin sores, discharge, or a new medicine. Seek prompt care if the skin is painful, hot, swollen, or rapidly worsening. A clinician can examine the skin and decide whether a hormonal, infectious, metabolic, or medication-related cause needs attention.

Ask whether the smell and sweating pattern suggest a skin problem, which antiperspirant strength is suitable, how to protect irritated skin, and whether your medicines or hormonal changes may contribute.