Our Chicago Foot Doctors Can Help With Your Ingrown Toenail Treatment . 5-Star Ingrown Toenail Treatment In Aurora, Chicago, Des Plaines, Glenview, Highland Park, Lake Forest, Libertyville, Oak Lawn, Oak Park & Roselle, Illinois (IL) , Ingrown Toenail Causes & Symptoms , This condition occurs when the toenail cuts into the surrounding skin. This may be due to a congenital curving of the nail, improper trimming, high heeled shoes, too narrow shoes, or toe deformities such as a bunion or overlapping toes that cause increased pressure on neighboring toes.