There are a number of other common contributors to heel pain due to the nerves that are tightly packed in around your Achilles tendon and the calcaneus bone. The posterior tibial nerve runs from the back of your lower leg, around the inside of your arch and to the bottom of your foot. When it is compressed by all the other muscles, tendons, ligaments and bones in your lower leg, ankle and foot, the compression can cause a burning sensation, numbness in the first three toes, tingling at the base of the foot and the heel, and a whole lot of pain that is both localized and even shoots up the leg. This condition is called tarsal tunnel syndrome (TTS), or posterior tibial neuralgia. TTS often causes more prolonged discomfort than plantar fasciitis after periods of rest. This could be because the posterior tibial nerve is connected to the sciatic nerve that runs along your legs, hip and lower back. Also unlike plantar fasciitis, which often has a general point of pain, TTS does not usually cause pinpoint tenderness along the plantar fascia.
Tarsal tunnel syndrome [KB1] can be caused by a number of factors. Basically, anything that causes compression in this area, be it cysts, bone spurs, inflammation, or even swelling from an ankle sprain, can aggravate the posterior tibial nerve. Biomechanics may play a role in TTS, as an abnormal gait may aggravate the posterior tibial nerve. Again, because of the numerous contributors to TTS, it is essential to contact your podiatrist for a diagnosis that will detect the underlying causation of TTS.