Your Achilles tendon is a thick, large tendon that connects your heel bone to the muscles in your lower leg. It is involved in many motions, such as walking, jumping and running. This tendon can become tight or overworked, both of which can lead to injury. One such injury is an inflammation of the tendon, or tendonitis (also spelled tendinitis). If left untreated, tendinitis will only get worse. In addition, the tendon can tear or rupture and require surgery.
Pain
According to the American Academy of Orthopaedic Surgeons, a common symptom of Achilles tendinitis is pain. At first, the pain may occur only during activities and then subside when you stop. It may be worse when pushing off your foot or trying to raise up on your toes. In the initial stages, your discomfort may be mild and not stop you from activity. However, if left untreated, the pain will become more severe to the point that it limits your activities. Eventually, the pain will remain even after you stop activities and can become chronic.
Stiffness
The area near your Achilles tendon may become stiff and difficult to move. This may be worse in the morning or after periods of inactivity. Your stiffness may get better with gentle movement. If you do not take steps to let your injury heal, you may find that you cannot point your foot and may have trouble walking.
Additional Symptoms
According to the Mayo Clinic, you may feel a bump or notice swelling a few inches above your heel. The area may also feel warm to the touch and become red. In addition, you may hear a popping or cracking sound when you move.


