Why Do My Toes Go Numb On The Treadmill?

Numbness in your feet and toes, after exercising on the treadmill or in other situations, is usually due to impinged nerves or poor circulation. If you wear shoes that are too small, have flat feet or suffer from diabetes, you are more likely to experience numbness in your toes. Treatment includes rest, ice and non-steroidal anti-inflammatory drugs. If you have underlying health issues or persistent symptoms, consult your physician.

Impinged Nerves

Peripheral neuropathy is a general term used to describe impinged, irritated or damaged nerves. Diabetes, infections and direct trauma to a nerve can lead to peripheral neuropathy and numbness in your toes. When the posterior tibial nerve is compressed in your ankle, it is referred to as tarsal tunnel syndrome and can cause numbness. Morton's neuroma is another cause of toe numbness and, the Foot and Ankle Center website explains, is when a nerve on the bottom of your foot is impinged and irritated. Sciatica or a herniated disc in your low back may lead to numbness or tingling in your feet and toes as well.

Poor Circulation

If severe enough, poor circulation in your feet and toes can lead to numbness and tingling. Causes of impaired blood supply include diabetes, heart disease, peripheral artery disease and varicose veins. Peripheral artery disease is when the arteries in your legs are narrowed due to plaque buildup. Cold feet, slow-healing sores and thick toenails are additional symptoms of poor circulation or peripheral artery disease, according to the American College of Foot and Ankle Surgeons.

Risk Factors

Wearing shoes that do not support your feet or are too tight can lead to an irritated nerve or restricted blood flow, respectively. Your foot type --- flat feet, for example --- may increase your risk of impinged nerves in your foot or ankle. Weak core muscles, improper lifting technique and muscle tightness may further increase your risk of back and foot injuries, leading to toe numbness. Poor walking or running mechanics such as walking excessively on the balls of your feet and over-pronating place more stress on your feet as well. Additional risk factors include your age, diet, weight and family history.

Treatment

For cardiovascular conditions and diabetes, stop your treadmill workouts and other physical activities until you consult your doctor about medication, exercise guidelines and surgery. If you have an impinged or irritated nerve, rest, ice and take non-steroidal anti-inflammatory drugs such as ibuprofen. Wear shoes that are the appropriate size, adequately support your arches and have plenty of cushion. Wear orthotics for additional support, particularly if you have flat or high arches. As symptoms subside, ride a stationary bike or swim and progress back to treadmill workouts. If symptoms continue or return with walking or running on the treadmill, seek treatment with a physical therapist. Physical therapy may include additional modalities such as ultrasound and injury specific exercises. Surgery may be necessary if conservative treatment does not alleviate your symptoms.