“…Fungal infection of the skin (tinea pedis) affects 13–16% of older people (5, 30, 32). Corns affect 9–62% (9, 18, 22, 29, 30, 33, 35) and callus 18–58% of older people (9, 17, 18, 21, 29, 30, 33). Hyperkeratosis, which is a thickening of the plantar skin, occurs among 23–77% of older people (4, 5, 27, 30, 34).…”