This is basically swelling of a thick layer of soft tissue under the sole of the foot which spreads to entire foot starting from the underside of the heel. This occurs commonly because of overuse and seen in the population who stand for long durations like teachers policemen, athletes, improper footwear. This can increase in intensity in cases with weak bones like vitamin D deficiency, high uric acid levels, low thyroid level patients etc. Rarely this can arise from nerve entrapment.