Extensor tendonitis: Causes, recovery, and prevention
Written by Nicole Galan Reviewed by William Morrison, MD
Last reviewed: Mon 5 June 2017
Extensor tendons are found just under the skin of the hand or the top of the feet. Extensor tendonitis is an inflammation of these tendons, and many factors can cause it.
Tendons are bands of tissue that connect muscles to bones. The extensor tendons connect the bones in the fingers to muscles in the back of the hand that help to straighten the fingers and thumb. In the feet, they connect the bones of the toes to the muscles in the front of the legs.
http://www.medicalnewstoday.com/articles/317785.php