An Achilles tendon rupture is a complete or partial tear that occurs when the tendon is stretched beyond its capacity. Forceful jumping or pivoting, or sudden accelerations of running, can overstretch the tendon and cause a tear. An injury to the tendon can also result from falling or tripping. A person with a ruptured Achilles tendon may experience one or more of the following:
Sudden pain (which feels like a kick or a stab) in the back of the ankle or calf, often subsiding into a dull ache
A popping or snapping sensation
Swelling on the back of the leg between the heel and the calf
Difficulty walking (especially upstairs or uphill) and difficulty rising up on the toes
These symptoms require prompt medical attention to prevent further damage.