Hammertoe Deformity: Hammertoe is a medical condition where one or more joints in a toe bends. The abnormal bending of the joint may get progressively worse over time and can contribute to daily discomfort. Because of the progressive nature of this condition it should be treated as early as possible. If left untreated, hammertoes may become very stiff and unable to respond to nonsurgical treatment options. Symptoms of hammertoe include, pain, irritation, corns, calluses, inflammation, redness, burning, and in some cases open sores may form.