Flat Foot

Signs and Symptoms

Almost all babies are born with flat feet. In most children, the arch of the foot doesn't develop fully until they are around 10 years old. In about 20 percent of children, an arch doesn't develop at all. Surgery is required to create an arch, for special "orthopedic" shoes or inserts, exercises and physical therapy fail to provide a permanent solution. Without surgery, these flat-footed children grow up to become flat-footed adults.

About 20 percent of adults have flat feet. Flat feet don't cause disabilities or other problems as long as the foot is supple and the heel cord, or Achilles tendon, isn't tight. This is called flexible flat foot. A supple foot looks flat when the child stands on the whole foot -- referred to as the "loaded" position -- but an arch develops when the person gets off the foot (in the "unloaded" position) and when he or she stands on the toes. If the heel cord can be bent up at the ankle more than 15 degrees from the perpendicular to the leg, it is not considered tight.

Although flexible flat feet don't need treatment, two other types of flat feet do:

• Rigid Flat Foot -- This is when the foot is flat in all positions, regardless of whether it is loaded, unloaded or the child stands on his or her toes.

• Flat Foot With a Tight Heel Cord -- This is when the foot is unable to be bent back at the angle more than 15 degrees due to the calf muscles, which form the Achilles tendon, being contracted.

These two types of flat feet occur in less than a third of people with flat feet and symptoms can include:

• Pain
• Calluses or redness
• Other evidence of the foot having trouble doing its job

Diagnosis

If your child continues to have flat feet after the age of 10, his or her doctor will perform a physical examination to determine what type of flat feet your child has. The doctor will have your child stand on the whole foot (in the "loaded" position) and on the toes. In addition, the doctor will check the shape of the foot when your child gets off the foot (called the "unloaded" position) as well as how far your child can bend their foot at the ankle.

Treatment

Flexible flat feet don't need treatment, and a child with flexible flat feet will not experience any limitations in sports or other physical activities. In fact, the incidence of flat feet in professional athletes is equal to that of the general population. Furthermore, flexible flat feet don't cause pain or arthritis in adulthood.

If your child has either rigid flat feet or flat feet with tight heel cords, the only treatment is surgery to alter the shape of the foot.