Brown @ black rash on my feet @ my feet are pilling?

Athletes Foot: Common fungal infection of the feet, due to the warm, dark, and damp environment which they are frequently exposed to. It can cause rash, blisters, burning, itching, and crusting. Start by using an otc cream such as clotrimazole, breathable /wicking shoes and socks. Keep feet clean and dry, especially between toes. Powders are good to dust toes and in shoes. If no improvement after a week- doctor.

Diagnosis: This can't be diagnosed with the information that is available. A history, physical examination & other studies may be needed to determine cause/causes. Once accurately assessed a treatment plan can be developed.

Need to see doctor: and have it checked and diagnosed and treated.