If there is a red and swollen bump on your finger that does not seem to be improving after four days, it is recommended to continue practicing good hygiene by washing with mild soap and warm water. If the area is open, cover it with a bandage and change it every 24 hours or sooner if necessary. You can apply a small amount of Polysporin on the bandage to prevent it from sticking to the skin during changes. If the pain, redness, or swelling worsens or if there is no improvement, it is advisable to consult a doctor.