Dark underarms may simply have to do with pigmentation and levels of melanin in the skin. But sometimes armpit discoloration is a sign of a health condition. Learn more here.

Tinea corporis is a superficial fungal infection ... If the condition persists, the patient may need a systemic treatment with griseofulvin 250-500 mg bid x 4 to 6 weeks. Alternatives are ...

Diagnosis of tinea versicolor can usually be made ... In one case report, treatment was successful with oral fluconazole 200 mg daily for 10 weeks, liquid nitrogen cryotherapy, and oral ...