Toenail fungus can cause thickening, crumbling, or rubbing of the toes. Nail bed damage can lead to irreversible injury if the toenail is not properly clipped or removed. Podiatrists can help children and adults prevent and treat foot and ankle injuries. I am not one of those people who is easily influenced by first impressions. To keep feet dry, use socks that wick moisture. Before recommending a treatment, your healthcare provider will consider a number of factors. Onychomycosis or toenail fungus is a fungal infection that occurs beneath the nail's skin.