The most common causes for the loss of a toenail include injury and infection, explains Foot Vitals. Dermatophytes, a contagious fungal infection, feeds upon keratin in nails.Continue Reading
Activities such as skating, running, skiing and playing soccer sometimes cause injuries that result in the loss of a toenail, according to Foot Vitals. Vigorous activity and pressure on shoe gear can result in blistering under the nail that causes the nail plate to separate.
Symptoms of a toenail that breaks or falls off due to injury include a collection of blood under the nail, discoloration and bleeding, explains Foot Vitals. An infection of the nail causes yellow, green or brown discoloration, pain, swelling and thickening of the nail.Learn more about Pain & Symptoms