If you really whack the toenail, by accidentally kicking a coffee table or dropping something heavy directly on the toenail, it can be easier for the fungus to get under the toenail and start a nail infection. If you hit the nail hard enough a bruise may develop and cause the toenail to turn black and blue.
A bruised toenail is a sign that you are at higher risk for developing a fungal nail infection. It will take several months for the bruised toenail to grow out. The bruise will simply be dragged out toward the end of the toe as the toenail grows. Gradually, you will trim off the toenail as the nail grows out. It can take 6 months to a year for the bruise to completely grow out and become clear again.
Dr. Christopher Segler is Board Certified, American Board of Podiatric Medicine. He believes the best podiatry practice combines cutting edge technology with the old-school convenience of house calls. He makes podiatry house calls to treat toenail fungus in San Francisco, Palo Alto, Sausalito, Pacifica, and Corte Madera. If you have a question about a fungal toenail infection, you can reach him directly at 415-308-0833.