-Fungal nail infections -Onychomycosis -Warm, moist environments -Discoloration of the nail -Thickening of the nail -Crumbling edges of the nails -Separation of the nail from its bed at the cuticle area -Unpleasant odor coming from under the nail -Antifungal medication -Cotton or wool socks -Trimming your nails regularly -Months or even years -Bacterial skin infections -Cellulitis,