Thanks for the query. This presentation can be seen with many skin diseases. The best option is to consult a Dermatologist in person to understand the problem and get it diagnosed. A proper treatment can then be started. Discuss the situation and hope it will be cleared in few days. Don't delay the appointment. Hope it helps you
Next Steps
If this is affecting a single foot, tinea pedis has to be ruled out. Meet a Dermatologist for further help.