Causes

Sometimes a single factor can lead to metatarsalgia. More often, several factors are involved, including:

• Intense training or activity. Distance runners are at risk of metatarsalgia, primarily because the front of the foot absorbs significant force when a person runs. But anyone who participates in a high-impact sport is at risk, especially if your shoes fit poorly or are worn.
• Certain foot shapes. A high arch can put extra pressure on the metatarsals. So can having a second toe that's longer than the big toe, which causes more weight than normal to be shifted to the second metatarsal head.
• Foot deformities. Wearing too-small shoes or high heels can cause your foot to be misshapen. A downward-curling toe (hammertoe) and swollen, painful bumps at the base of your big toes (bunions) can cause metatarsalgia.
• Excess weight. Because most of your body weight transfers to your forefoot when you move, extra pounds mean more pressure on your metatarsals. Losing weight might reduce or eliminate symptoms.
• Poorly fitting shoes. High heels, which transfer extra weight to the front of your foot, are a common cause of metatarsalgia in women. Shoes with a narrow toe box or athletic shoes that lack support and padding also can contribute to the problem.
• Stress fractures. Small breaks in the metatarsals or toe bones can be painful and change the way you put weight on your foot.
• Morton's neuroma. This noncancerous growth of fibrous tissue around a nerve usually occurs between the third and fourth metatarsal heads. It causes symptoms that are similar to metatarsalgia and can also contribute to metatarsal stress.