A suddenly high arch
It could be: Nerve damage. “Most high-arched feet are associated with some form of underlying neuromuscular condition,” says Pichney. “If someone has thinning of the arch muscles in the foot, it could be an indication of a neurological condition called Charcot-Marie-Tooth (CMT).”
An inherited disorder that damages the peripheral nerves (those outside the brain and spinal cords), CMT can also cause changes in the gait, numbness in the feet, difficulty balancing, loss of muscles in the lower legs, and later on, similar symptoms in the arms and hands. See your doctor if you notice abnormalities. “For anything that’s different or changes when it comes to the foot, see your podiatrist right away,” says Reid.