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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.
Figures. 1  Figure 1 - Extensor tendons, located on the back of the hand and fingers, allow you to straighten your fingers and thumb. 2  Figure 2 - The mallet finger deformity causes a droop of the fingertip. This is caused by injury to the extensor tendon at the last finger joint.