the Achilles tendon attaches the calf muscle to the heel. Inflammation of this tendon can be caused by stiff calf muscles and running on hard surfaces like concrete or bitumen.
stress fracture
a hard impact or awkward landing may fracture the heel bone
diagnosis
largely clinical supported by plain Xray
plain Xray shows increased density and/or fragmentation of the Achilles apophysis on the posterior aspect of the calcaneum.
Mx
rest, ice
flexibility exercises to help lengthen the lower leg muscles
shoe inserts may help
non-weight bearing exercises such as swimming and cycling once initial symptoms settle
analgesics
time - it may take 2-8 weeks for the symptoms to settle with avoidance of running and jumping.