Re: swollen pinky finger
You may have an infection of the lateral nail fold called paronychia. Is it red in color as well as swollen? You may also have a small cut or tear to the nail fold where it attaches to the nail plate -- either way, it will hurt and be swollen. Clean the site with alcohol or peroxide and apply an antibacterial ointment. If it does not get 'better' within a few days, I would advise seeing a dermatologist. If it is the beginnings of a paronychia infection of the nail fold, it will require prescribed medication.