Morton's Neuroma is a condition of the feet where a fibrous tissue formation around nerve tissue forms and becomes inflamed between the third and fourth toes in the forefront of the foot. This can cause severe to debilitating pain in most people along with numbness and tingling in the first three toes.
The most common cause of this condition is wearing shoes that are too narrow in the toes or too tight. High heeled shoes are also culprits. Often times, it will feel like a pebble is under the foot and taking off the shoes will help to relieve the pain although it can continue and cause further issues.