Are there any types of shoes I should avoid?

Yes. It is a good idea to avoid high heels, as they put increased pressure on the ball of the foot, place the back of the foot in an unstable position, and increase the movement of foot tissues in opposite directions, a primary cause of calluses, blisters, and ulcers. (Heels should be less than one inch in height.) It is also a good idea to avoid slip-on loafers, which provide inadequate foot support, and sandals with straps between the toes, which can cause irritation.