With an Achilles Tendon Rupture, you might end up needing surgery. These stretches and exercises can help you before and afterwards. The stronger and more flexible you can be before a surgery, the better your recovery will be after. See Doctor Jo’s blog post about this at: http://www.askdoctorjo.com/achilles-tendon-rupture
Stretches for Achilles Tendon: Stand with the balls of both feet on the edge of a stair or curb Keeping your affected leg straight, slowly let that heel hang down off of the stair or curb until you feel a stretch in the back of your calf and/or Achilles area. Some of your weight should still be on the other leg. Hold this position for at least 15 to 30 seconds. Repeat 2 to 4 times a session, up to 5 times a day or whenever your Achilles tendon starts to feel tight.
This one is located at you guessed it, the Achilles tendon. It happens usually from not stretching tight calf muscles out prior to or after exertion. It is always has a way of making everything sound more serious than what it could possibly be.