Tarsal Tunnel Syndrome
Tarsal tunnel syndrome is a condition caused by repeated pressure that results in damage on the posterior tibial nerve. Your tibial nerve branches off of the sciatic nerve and is found near your ankle.
The tibial nerve runs through the tarsal tunnel, which is a narrow passageway inside your ankle that is bound by bone and soft tissue. Damage of the tibial nerve typically occurs when the nerve is compressed as a result of consistent pressure.
People with tarsal tunnel syndrome may experience pain, numbness, or tingling. This pain can be felt anywhere along the tibial nerve, but it’s also common to feel pain in the sole of the foot or inside the ankle. This can feel like:
- sharp, shooting pains
- pins and needles
- an electric shock
- a burning sensation
Symptoms vary greatly depending on each individual. Some people experience symptoms that progress gradually, and some experience symptoms that begin very suddenly.
Pain and other symptoms are often aggravated by physical activity. But if the condition is long-standing, some people even experience pain or tingling at night or when resting.
At your appointment, your doctor will ask about the progression of your symptoms and about medical history like trauma to the area. They’ll examine your foot and ankle, looking for physical characteristics that could indicate tarsal tunnel syndrome. They’ll likely perform a Tinel’s test, which involves gently tapping the tibial nerve. If you experience a tingling sensation or pain as a result of that pressure, this indicates tarsal tunnel syndrome.
Your doctor may also order additional tests to look for an underlying cause, including MRIs, if your doctor suspects that a mass or bony growth could be causing the tarsal tunnel syndrome.
Treating tarsal tunnel syndrome depends on your symptoms and the underlying cause of your pain.
You can take anti-inflammatory medications (including nonsteroidal anti-inflammatory drugs) to reduce inflammation, which may alleviate compression of the nerve. Resting, icing, compression, and elevation, known as the RICE treatment, may also help reduce swelling and inflammation.
In some cases, braces and splits may be used to immobilize the foot and limit movement that could compress the nerve. If you have naturally flat feet, you may want to have custom made orthotics made that support the arches of your feet.
In severe, long-term cases, your doctor may recommend a surgery called the tarsal tunnel release. During this procedure, your surgeon will make an incision from behind your ankle down to the arch of your foot. They will release the ligament, relieving the nerve.
A minimally invasive surgery is also used by some surgeons, in which much smaller incisions are made inside your ankle. The surgeon uses tiny instruments to stretch out the ligament. Because there’s less trauma sustained by the tissues, the risk of complications and recovery time are both reduced.