The skin around the splinter is particularly red, painful, swollen, or bloody. The site of a splinter appears to be infected (ie, it is increasingly painful or red, swollen, there is discharge, there is associated fever or swollen lymph nodes, or there is red streaking from the affected area toward the heart). Have a deep treated splinter in finger tip, cant get it out, have a deep treated wood splinter in finger tip, cant get it out, finger hurts, dont want to go to emergency room for a splinter … Causes of finger swelling. Up to half of people with psoriatic arthritis develop it. Sometimes that reduces the swelling and inflammation enough to let you pull it out easily with tweezers. Most of the causes are as a result of inflammation due to injury of the fingers and all hand. Second is uniform swelling of the finger. Ibuprofen doesn't seem to help. Tetanus immunization is not up to date. Probably a surgeon who may have to cut to find the source. I have an infection in my finger from a splinter, which is too deep to find. The finger is swelling and getting painful. The sp-inter may not be organic and may be inert, like fiberglass. The most common cause of dactylitis is psoriatic arthritis . First is tenderness over the flexor or palm side of the finger. I won't be able to see a doctor till tomorrow am. If there’s a little bit of the splinter sticking out but you just can’t pull it out because of the swelling, try icing the area where the splinter went in. With the fingers being such an active part of the body is often the most likely part to become inflamed whether due to a mechanical or chemical injury or an infection. Dactylitis causes swelling and pain, and makes it hard to move your fingers. This pain is found over the tendons in the finger.