Pes Planus is a condition where the arch area of the foot has either not properly developed or collapsed to the point where the sole of the foot is nearly in complete contact with the surface the foot is on. Up to thirty-percent of people who have flat feet simply never developed arches in one or both feet.

Flat feet can be acquired as an adult. This can be attributed to aging, illness, injury and continuous stress. Women over 40 are more inclined to develop flat feet. If developed during adulthood, feet will probably remain flat. Known contributing factors include:
• Weight
• Diabetes
• High blood pressure
• Pregnancy (may cause temporary flattening of the feet)
As long as the feet remain flexible and do not cause pain in the foot, knee or lower back, they can go untreated. If pain becomes an issue, the first thing you must do is see Dr. Bowman for a correct diagnosis. He can determine if orthotics is necessary or he may assign foot exercises that can help strengthen your arches. In the worst cases surgery may provide relief, but would only be considered after all other methods had been tried.
If you have pain in your arches, lower leg, knees or lower back, you may have flat feet. Call Dr. Bowman at (713) 467-8886 for a correct diagnosis, so you can get back on the right path.
References:
http://www.mayoclinic.com/health/flatfeet/DS00449
http://en.wikipedia.org/wiki/Flat_feet