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Unfortunately your finger got infected causing the pain and swelling.
You will need oral antibiotic therapy with bactrim or clindamycin.
You can wash the area with alcohol and put bacitracin ointment on meanwhile.
You should go to the urgent care today for antibiotic course.
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That is good sign.
You can then consider applying over the counter bacitracin ointment twice daily and wash the area with peroxide daily.
If the symptoms worsen, then you should consider oral antibiotic.