Toenail dystrophy is commonly confused with fungal nails. Dystrophic nails can be discolored, deformed, thickened or changed in some way that does not look like the other nails.
When a big toe is jammed over and over again on a hard surface, it can cause an injury called turf toe. We see this mostly with athletes who play on artificial turf and repeatedly stop and start suddenly, such as with soccer and football.