Morton's neuroma refers to the formation of an inter-digital neuroma as a result of an injury to one of the digital nerves. A neuroma is a benign growth of tissue, and this pain is usually in the third or fourth toe. MayoClinic.com states that Morton's neuroma causes a sharp, burning pain in the ball of the foot and may cause the toes to sting, burn or feel numb. According to MedlinePlus, the cause of Morton's neuroma is unknown, but the condition is more common in women and may be associated with foot biomechanics, including toe position, arch support, improper shoes and other foot syndromes like bunions.
Pain
The pain caused by Morton's neuroma can be quite severe and is usually a burning pain. This pain may radiate into the toes and make it difficult to walk. According to MedlinePlus, a sharp pain may also shoot from the ball of the foot toward the toes. The neuroma is a ball of tissue that is deep in the foot. Generally it is not visible on the outside of the foot. Metatarsalgia, which is joint pain in the toes, occurs in the same area and is related to a fallen transverse arch. Over time, metatarsalgia may reveal a callus under the toes, which is not the same as a neuroma. In addition, another possibility of pain in this area of the foot is a stress fracture brought on by running or walking. This pain is usually abrupt and related to walking and running.
Tingling and Toe Cramping
The pain may also cause cramping in the muscles of the foot and tingling into the toes. As the muscles become tight, they may irritate surrounding nerves and cause a tingling pain into the third and fourth toes. This may lead to numbness, and the cramped muscles may affect walking biomechanics, which may further irritate the area.
Pain That Increases With Certain Shoes
The discomfort of Morton's neuroma may come on gradually or it may be noticed with the use of certain types of shoes. Shoes that push the toes together may cause the symptoms. This can include high heeled shoes or shoes with a small toe box. If this is the case, then it is best to avoid these types of shoes.
References
- "Orthopedic Physical Assessment, Fifth Edition"; D.J. Magee; 2008
- Mayo Clinic: Morton's Neuroma
- Medline Plus: Morton's Neuroma
