You could sprain your ankle
BlankaB/Shutterstock Those rubber flip-flops you picked up for cheap are fine for the beach, but you won’t want to wear them all day. They have virtually no arch support, which means your feet will start to turn toward the middle of your body instead of staying straight. When that happens, you’re more likely to sprain your ankle, says Eunice Ramsey-Parker, DPM, MPH, associate professor of podiatric medicine and clinic administrator of the Foot Center of New York. “They won’t trip over anything, but because they don’t have support, they twist their ankle in or out,” she says. Finally learn the difference between a sprain, strain, and fracture.
You foot could get inflamed
BlankaB/Shutterstock Even if you’re extra careful and don’t twist your foot, that lack of arch support could kill your feet. Without the right support, your plantar, the band of tissue in the arch of your foot, will start to pull. That pulling inflames the tissue, making your arch red and painful from a condition called plantar fasciitis. “When you try to step down on your foot, you have excruciating pain in the arch,” says Dr. Ramsey-Parker. To get the inflammation down, you might need to use anti-inflammatory medications like ibuprofen (learn the best OTC pain reliever for your ache), physical therapy, exercise, or cortisone injections.