Q: I have noticed my nails getting thicker. Am I developing a fungus?

A: Possibly. Over the years, our toenails can grow thicker, even discolored, due to the cumulative results of infection with toenail fungus. This depends upon a mix of environmental exposure, susceptibility, and foot hygiene, which varies from person to person. Topical (and in some cases oral) medication can be prescribed. A history of injury to a toenail can also make the nail become thickened and discolored over time.