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1. Shaving Shaving, in certain situations, can cause dark underarms. Shaving removes the hair from the surface of your skin. Thus, the darkness is due to the hair follicles that are left just below the surface of your skin.
2. Deodorants And Antiperspirant Deodorants and antiperspirants sure do protect the body from bad odour. But, if you read the description on the bottles, these are loaded with chemicals that might irritate the skin causing it to be dark.
3. Accumulation Of Dead Skin Dead cells are formed all over our body and accumulate on the surface of our skin. The underarms are no exception to this. Accumulation of dead skin cells around the underarms can be another cause for dark underarms.
4. Hyperpigmentation Hyperpigmentation is a common, mostly harmless, condition where certain areas of skin appear darker than the surrounding skin. This is due to the excess melanin, the pigment that gives colour to the skin.
5. Friction Caused By Tight Clothes The skin around our underarms is softer and more sensitive compared to other body parts. Wearing clothes that fit tight can cause friction between the cloth and skin, resulting in sweating and irritation (sometimes even causing a rash)
6. Bacterial Infection Our underarms get sweaty easily and this makes the area a perfect home for bacteria. Excessive sweating can be the cause of bacteria being trapped in the skin in the underarms thus causing black underarms.
7. Melasma Melasma is a common skin problem. It usually looks like common dark patches on the skin. It appears mostly on those parts of the body that are exposed to the sun. It is more common in women than in men. Hormonal changes during pregnancy can trigger melasma as well.
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