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Psoriatic arthritis most often causes swelling and joint pain in the fingers and toes. Aortic stenosis Aortic stenosis is a condition of the heart causing shortness of breath, dizziness, or chest pain.
A swollen finger can occur due to many reasons, 1  Cause for swollen finger includes injury, infection, repetitive motion and broken finger. 2  Nail biting also causes serious infections. 3  Paronychia is another condition where pus is formed below the nail and skin leading to a inflammation and redness around the area.