Extensor tendonitis causes pain across the top of the foot. The extensor tendons join the muscles on the front of the lower leg, to the toes. They pull the toes upwards away from the ground. The two ...

De Quervain tenosynovitis is pain and swelling in the tendons around your thumb. Specifically, it affects the tendons of two muscles called abductor pollicis longus and extensor pollicis brevis. De ...