Merck Manual

Please confirm that you are not located inside the Russian Federation

honeypot link

Stress Fractures of the Foot

By

Paul L. Liebert

, MD, Tomah Memorial Hospital, Tomah, WI

Last full review/revision Feb 2020| Content last modified Feb 2020
Click here for the Professional Version
Topic Resources

Stress fractures are small, incomplete fractures (breaks) in bones that result from repeated stress rather than a distinct injury.

  • Pain occurs with weight-bearing and worsens gradually.

  • X-rays or a bone scan is done.

  • The fractured part should not bear weight for at least 6 to 12 weeks.

Stress fractures develop when repetitive weight-bearing exceeds the ability of the supporting muscles and tendons to absorb the stress and cushion the bones. Stress fractures can involve the thighbone, pelvis, or shin. More than half of all stress fractures involve the lower leg, most often the bones of the midfoot (metatarsals).

Stress fractures do not result from a distinct injury (for example, a fall or a blow) but occur after repeated stress and overuse. Stress fractures of the metatarsal bones (march fractures) usually occur in runners who too quickly change the intensity or length of workouts and in poorly conditioned people who walk long distances carrying a load (for example, newly recruited soldiers). Other risk factors include a high foot arch, shoes with inadequate shock-absorbing qualities, and thinning bones (osteoporosis).

Women and girls who exercise strenuously and do not eat an adequate diet (for example, some long distance runners and some athletes in sports that emphasize appearance) may be at risk of stress fractures. They may stop having menstrual periods (amenorrhea) and develop osteoporosis. This condition is known as the female athlete triad (amenorrhea, disordered eating habits, and osteoporosis).

Did You Know...

  • Stress fractures of the bones of the foot are sometimes called march fractures because they commonly occur among newly recruited soldiers who have recently started marching long distances.

Symptoms of Foot Stress Fractures

With metatarsal stress fractures, forefoot pain most often occurs after a long or intense workout, and then disappears shortly after stopping exercise. With subsequent exercise, onset of pain is earlier and may become so severe that it prevents exercise and persists even when not bearing weight.

Diagnosis of Foot Stress Fractures

  • X-rays

Standard x-rays are usually done but may be normal until about 2 to 3 weeks after the injury, when x-rays show that the bone is healing from the fracture. Earlier diagnosis is often possible by doing a bone scan or magnetic resonance imaging (MRI). Women who have stress fractures should talk with their doctors about whether they should be tested for osteoporosis.

What Is a Stress Fracture?

Stress fractures are small cracks in a bone caused by repetitive impact. They commonly occur in the bones of the midfoot—the metatarsals.

What Is a Stress Fracture?

Treatment of Foot Stress Fractures

  • Rest

Treatment includes reduction of weight-bearing on the involved foot. For a while, the person uses crutches and a wooden shoe or other commercially available supportive shoe or boot. Casts are sometimes needed. Healing can take up to 12 weeks. As with other injuries, people can maintain aerobic fitness by doing non-weight–bearing exercises (for example, swimming) until recovery is complete.

NOTE: This is the Consumer Version. DOCTORS: Click here for the Professional Version
Click here for the Professional Version
Others also read

Test your knowledge

Snakebites
Which type of snake accounts for the great majority of poisonous snakebites in the United States each year?
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID

Also of Interest

Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
TOP