In extreme cases, you may be advised that the best solution is a custom-made shoe. Although this option is more expensive than regular shoes, it is less expensive and less traumatic than foot surgery. Sock material is important. If you always have dry feet, you can wear anything. If your feet are often damp or sweaty, wear polypropylene or acrylic socks and avoid cotton.
Cotton is hydrophilic and clings to water like limpets on rock.
It provides a permanently damp environment for your feet that encourages fungal infections and blisters. Polypropylene and acrylic are hydrophobic, wick sweat away from your skin by capillarity, and carry it to the outside of the fabric surface where it can evaporate. A callus tends only to spread outward, but a corn tends to grow inward as well. Because they are in only the stratum corneum, which is dead tissue, you can simply get rid of them. Soak your foot in warm water to soften the tissue.