MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Flat foot. Coloured X-ray of the flat foot of a 25 year old woman. The decreased arch of the foot in this condition, also known as pes planus, means that her sole lies flat on the ground. The bones are orange and flesh is blue. The heel bone (lower left), metatarsals and tarsals are almost aligned in a straight line. Nearly all babies have flat feet, the arches only developing during childhood as the feet muscles and ligaments grow stronger. However in people with weak muscles and ligaments the arch can fail to develop. Flat feet can also develop in adults, for example in people who gain weight rapidly. Treatment with arch supports and exercise is only needed if the feet are painful.
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