Dark spots under the armpits may be caused by hyperpigmentation, lichen planus, or pigmented nevi. It can be treated by topical medication, oral medication and physical therapy.
1. Hyperpigmentation: it can be treated by applying topical decolorizers to lighten the color, such as hydroquinone cream and arbutin cream ointment.
2. lichen planus: due to fungal infection, need to give antifungal treatment, such as using ketoconazole lotion bath, apply miconazole ointment, oral itraconazole and other drugs.
3. Pigmented nevus: physical treatment such as electrocautery, electrodesiccation and carbon dioxide laser can be used to make the pigmented nevus carbonized and vaporized through high temperature cauterization, so as to make it fall off.
There may be other conditions if there are black spots under the armpits, so you can go to the hospital to improve the relevant examination to clarify the situation and take corresponding measures. The above drugs are recommended to be used under the guidance of a doctor, avoid self-medication.