Hammertoes are usually caused from an imbalance of the tendons on both the top and bottom of the foot. This causes the toe to become contracted and no longer remain straight in appearance. This can then create an irritation and rubbing on top of the bent toe from closed shoes. This may even lead to open sores if not treated early, especially in diabetics and people who have impaired circulation. There are two types of hammertoes that are typically encountered. There are rigid hammertoes, which makes the toe unable to move thus requiring surgical intervention. A flexible hammertoe is less severe and can be managed conservatively with varying treatment options.