Flip-flops, although in style right now, have no arch support of any kind. Manufacturers are starting to add some arch raise to flip-flops, but even with an arch, they offer no stability for the foot.This means the foot will move when walking, especially at the end of gait when coming off the toes, instead of remaining stable. As a result, blisters or pain on the ball of the foot can develop.Ballet-style flats are just as bad as flip-flops because they also have inadequate foot support.Repeated wearing of any type of shoe without support can lead to plantar fasciitis, which is pain in the arch support system of your foot.

The pain will generally confine itself to the bottom of the heel. Pain will be worse when waking up in the morning or getting up from sitting.It can occur with as little as one day of wearing of non-supportive shoes, and the pain can last for up to a year. Five to 10 percent of patients need surgery to try and correct the problem. For those in the baby boomer age range, it can also lead to a form of chronic tendonitis and pain along the inside of the ankle and foot