The<unk>  tendon is the extension of the calf muscle and attaches to the heel bone. It causes the foot to extend (plantar flexion) when those muscles contract. The<unk>  tendon does not have good blood supply or cell activity, so this injury can be slow to heal. The tendon receives nutrients from the tendon sheath or paratendon. When an injury occurs to the tendon, cells from surrounding structures migrate into the tendon to assist in repair. Some of these cells come from blood vessels that enter the tendon to provide direct blood flow to increase healing. With the blood vessels come nerve fibers. Researchers including Alfredson and his team in Sweden believe these nerve fibers to be the cause of the pain - they injected local anaesthetic around the vessels and this decreased significantly the pain from the<unk>  tendon.
Achilles tendinitis
Achilles tendon rupture
Tarsal tunnel syndrome
Median rhomboid glossitis
Ulnar tunnel syndrome
Trapeziometacarpal osteoarthritis
Anterior interosseous syndrome
Tenosynovitis