A common condition in women over 40, is when the posterior tibial tendon, which runs from the calf to the arch of the foot, becomes inflamed or tears. This tendon is one of the major supporting structures in the foot, and helps during walking. If it is damaged, the inside of the arch seems to disappear, making the foot look flat. This can be caused by wear and tear, injury, or by being overweight.
You can wear an aircast boot for about 6 weeks to take pressure off the tendon, to allow it to heal.
Physiotherapy can assist, but surgery may be required.

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