We all know the feeling: You walk out the door for a day on the go, only to find 20 minutes later that your choice of footwear just isn't going to cut it in the comfort department. Unfortunately, the pain and blisters aren't the only downsides to wearing uncomfortable shoes—there's the chance they could cause more long-lasting damage to your feet. To help you prevent this, we reached out to an expert to find out which shoes are the worst for foot health.

Frankly, we expected high heels to top the list, but podiatrist Robert Khorramian, MD provided a surprising response to our question. The worst offender? Ballet flats. Dr. Khorramian pointed out that with women's busy schedules, unstructured flats don't offer enough support. He noted that walking for long periods of time in ballet flats "causes metatarsalgia neuroma and plantar fasciitis," and also "destroys the fatty tissue underneath the feet," resulting in the ever so dreaded corns and calluses.