Why does toe nail fungus happen?

Fungus on skin: Fungus on the skin spreads to the nai in susceptible individuals. When ignored the fungus spreads from the end of the nail inward involving part or the whole nail.The greater thecinvolvement thecmore difficult it is to eradicate. Oral medications work only inbabout 60 per cent or less spending on severity. Lasers can be effective but may need to be repeated in 2 years.

Several things: Fungus loves to grow in a dark moist environment, which is a shoe and sock. You could have decreased blood circulation so can't fight off fungus.

Why fungus?: Fungus is everywhere in the environment. If it enters an area where fungus can reproduce (dark, moist, warm) then it can start to grow. Keeping your feet dry and seekin care at the first sign of any nail chages is your best chance to prevent it.