hammertoe is caused when the middle joint (PIP) bends down towards the floor (flexion). To compensate, the joints above and below (MTP, DIP) bend up (hyperextend). The result is that the middle part of the toe lifts up. Hammertoe is the most common deformity of the lesser toes (i.e. not the big toe). It tends to only affect one toe, most commonly the second.
Hereditary and shoe gear are probably hammertoe the most likely reasons to develop a hammer toe. Tight pointy shoes may cause a hammer toes. High heels also can cause hammer toes. A deformed toe often develops over time, and certain types of feet may be predisposed. Some patients may develop a hammer toe or cross over toe (of the 2nd toe) due to a bunion of the big toe.
If the toes remain in the hammertoe position for long periods, the tendons on the top of the foot will tighten over time because they are not stretched to their full length. Eventually, the tendons shorten enough that the toe stays bent, even when shoes are not being worn. The symptoms of hammertoe include a curling toe, pain or discomfort in the toes and ball of the foot or the front of the leg, especially when toes are stretched downward, thickening of the skin above or below the affected toe with the formation of corns or calluses, difficulty finding shoes that fit well. In its early stages, hammertoe is not obvious. Frequently, hammertoe does not cause any symptoms except for the claw-like toe shape.
Your doctor is very likely to be able to diagnose your hammertoe simply by examining your foot. Even before that, he or she will probably ask about your family and personal medical history and evaluate your gait as you walk and the types of shoes you wear. You'll be asked about your symptoms, when they started and when they occur. You may also be asked to flex your toe so that your doctor can get an idea of your range of motion. He or she may order x-rays in order to better define your deformity.
Non Surgical Treatment
A person with hammer toes will be asked to practice some exercises for their toes to regain average structure and movement. The exercises usually involve stretching and strengthening their toes. The person may attempt to pick things up off the floor using only their toes. They may also stretch their toes on a regular basis by hand to ease them into straightening out. Another example of a physical exercise specifically for a person's toes involves crumpling a towel with the toes. The towel can lie underneath the person's feet and the person can use their toes to scrunch up the towel as they perform simple tasks such as reading a book or watching television.
There are generally two methods surgeons use to correct hammer toes, they are joint resection (arthroplasty) or bone mending (fusion), and the location where this is performed on the toe depends on where the toe is buckled. Its important to recognize that most of the surgical work involved the joints of the toe, not the joint of the ball of the foot. Sometimes a toe relocation procedure is needed when the joint of the ball of the foot is malaligned (subluxed or dislocated).