Tarsal Tunnel

Tarsal Tunnel syndrome is a condition caused by entrapment of the tibial nerve on the inside of the ankle.
It is very tight in this area of the foot so there is very little room for any expansion if the nerve becomes inflamed or enlarged. This inflammation of the nerve causes the entrapment.
When this entrapment compresses the nerve it could cause pain, burning, and tingling on the bottom of the foot. You could notice that this worsens as the day progresses. It is relieved by rest, elevating the foot or rubbing the area. A doctor may order an EMG which may reveal decreased nerve conduction around the tarsal tunnel. If a Dr. thinks a soft tissue mass is causing the entrapment then he may order a MRI.
People with very flat feet or if they pronate then they are more likely to develop tarsal tunnel.
Some systemic diseases such as rheumatoid arthritis can cause a swelling in joints that may compress on the nerve.
Conservative treatment consists of the use of an orthotic especially if the feet are very flat. Anti-inflammatory drugs may be helpful and sometimes steroid injections can be effective.