what causes a thick nail bed
(773) 327-0006. Toenail fungus, also known as onychomycosis, can and often causes discoloration, thickness, brittleness, and/or lifting of the toenail from the nail bed. These symptoms make it easy to assume that every abnormal toenail is the result of fungus, but that is not always the case.
The characteristics of a fungal nail infection depend on the cause, but may include: 1  Lifting of the nail plate off the nail bed. 2  Thickening of the nail plate. 3  Crumbling of the nail plate.  Discolouration, usually in 1  streaks. White, yellow or green smelly discharge.  Flaking and pitting of the surface of the nail plate.