You can strengthen the Achilles tendon by doing heel raises or toe pulls. These stretching workouts not only strengthen the tendon but also repair it in case of mild injuries.
Achilles tendon pains or hurts when it is injured or a person regularly places too much strain on the tendon. The pain feels like a burning sensation or stiffness in that part of the leg. In case of a severe pain, the Achilles tendon may be partly or completely torn. Achilles tendon injuries commonly occur in people who engage in activities that involve running, jumping, and sudden starts and stops.