Treatment challenges Several things make it especially challenging to treat toenail fungus: The thickness of the nail can pose a barrier between treatment and the fungus under the nail Additionally, the time it takes for a healthy nail to grow back varies from person to person. Even after the ...
the fungus may be killed after one treatment. The need for retreatment may occur because of reinfection from the environment. The treatment causes slight warmth, or possibly in a few patients, the sensation of a slight pinprick.