What to use if you have an infected finger?

Few things can help: Clean well with soap and warm water, may apply neosporin or a triple antibiotic keep clean and covered. If not helping sometimes oral antibiotic is needed.

See a physician: Infections of the finger require antibiotics to treat and can sometimes become severe and require surgery. The best option is to see your physician to assess if this is something that can be treated with medication or if it requires surgery. The earlier the better.