Unfortunately the information you have provided is very limited and incomplete. Infection can be from bacteria , fungus or virus. Depending on the infection the treatment would be advised accordingly. Also, there is no information on what you have taken so far. You can either tele consult with me or you can visit me or any dermatologist in person for a better assessment and advice. Sorry can't offer more at this point. Hope his was helpful.
Next Steps
Get a dermatologist opinion.