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"I have an infection in one finger that started a week ago and since then there has been pus and pain. My finger is red and sensitive. What should I do?"

If you have an infection in your finger with pus and pain, it could be a paronychia. In this case, using Polysporin may not be enough. You should try using Bactroban cream, which you can get from a pharmacist without a prescription. Apply the cream to the affected finger three times a day for 10 days. If you don't see any improvement within three days, it's best to see a doctor.