The Achilles tendon connects the calf muscles to the heel bone. A rupture, or tear, can occur when the tendon is overstretched. This injury is very painful. You may hear a popping or snapping noise when the tendon is torn.

Achilles Tendon Rupture
Achilles Tendon Rupture
© 2011 Nucleus Medical Media, Inc.

Achilles tendon rupture can be caused by:

  • Too much stress placed on the tendon, common during:
    • Running, especially on hills, stairs, and hard surfaces
    • Lunging, jumping, twisting (eg, basketball, football, rugby)
  • Weakened tendon that has not fully healed from previous injury, use of medication, or disease
  • Overworking an inflamed tendon
  • Having an accident where the tendon is cut or mangled (less common)