If worn frequently or for extended periods of time, flip-flops can cause hammertoes and bunions. Hammertoe is a condition where the toe bends abnormally as a result of joint contraction. Walking in flip-flops shortens the stride, which can lead to calf muscle tightness and Achilles tendonitis. You can, however, avoid any potential inconvenience by ordering the ideal pair of flip-flops from the best store that is known to sell the best flip flops for Plantar Fasciitis.