Another possible cause of Haglund's deformity is extreme stretching of the calf muscle. This stretching causes the calf muscle to pull on the tendon, which in turn may cause the bone to grow outwards in an attempt to keep the tendon attached to the bone.
Depending on the location of the pain, the back of the heel or the bottom, another possibility for the pain and bump is a <a target=_blank class=ftalternatingbarlinklarge href="http://images.google.com/images?client=firefox-a&rls=org.mozilla:en-US<img src=---i/expressions/face-icon-small-blush.gif--- border=---0--->fficial&channel=s&hl=en&q=heel%20spur&btnG=Google+Search&ie=UTF-
&oe=UTF-8&sa=N&tab=wi">heel spur</a>. One possible cause is a cessation of habitual running thereby causing the
plantar fascia, the ligament connecting the heel to the toes, to constrict since it is not being used as much as it had been during the period of habitual running.
Treatments include increased calcium intake or soft stretching of the
plantar fascia. An easy method to stretch the ligament on the bottom of the foot is to stand with your toes on a stair and your heel hanging off. Another method is to obtain one of those foot massagers that resembles a rolling pin, lay it on the floor, and roll your foot over it.