**Morton's neuritis** is an inflammation of the bundles of muscles that originate in the two bones of the intermetatarsal joint and end on the underside of the foot. The pain is caused by pinching of the nerve by bundles of the same muscles in its canal. Usually only one leg is affected, usually the left.
The definition of Morton's neuritis primarily refers to neuropathy (a non-inflammatory disease of the nerves), although there is no pathognomonic for this pathology. Neuritis can be “pure” neuropathy, or it can be layered with an inflammatory component, that is, microtraumas contribute to the development of the inflammatory process in the nerve. Often, secondary neuropathies of the peripheral nerves subsequently develop. In this case, not only axial, but also peripheral nerves are involved in the process.