causes of armpit dark color
Irritations and Allergic Reactions. External assaults to the skin can also cause formation of dark skin patches in underarm area. For example, chemicals in underarm products such as deodorants and antiperspirants are known for causing allergic reactions and irritations of the skin. Another type of external assault to the skin is excessive rubbing.
Dark underarms may be caused by dead skin cells that have accumulated there, so exfoliating can reduce the dark appearance of the skin. Sugar - Mix a cup of brown sugar with 3 tbsp. extra-virgin olive oil. Apply to wet skin for a minute or two during a shower or bath and rinse.