Weakened muscles in the toes contribute to the curled appearance known as “hammertoes.” This weakness shortens the tendons in the toes, causing them to contract. Hammertoes can be hereditary and are very common in people with high arches. They can be aggrevated by wearing shoes that are too small and provide inadequate toe room. Hammertoes can lead to foot problems such as calluses, sores, blisters, and difficulty walking. Wearing roomy footwear can help to reduce associated discomfort. Sometimes surgical procedures are needed to straighten the affected toes.