why do toenails turn yellow and thicken
A Thickened Toenail - A Dilemma? thick, yellow, brown, spongy to cut and ; contains in appearance moth eaten nail then more than likely you have a toenail fungus. Thickened Toenail 101. But if you have just a thickened toenail and is hard, then it is unlikely a toe nail fungus is present.