You can get a nail fungus infection when you come in contact with the fungus and it begins to grow on or under your nail.
Nail fungus infections are usually caused by dermatophytes (a fungus group). But nail fungus infection can be appear if there are yeasts and molds on your body.
All of these microscopic organisms live in warm, moist environments (including swimming pools and showers). They can infect your skin through small unseen cuts or through a little separation between your nail and nail bed. They cause problems only if your nails are continually exposed to warmth and moisture, a perfect condition for the growth and spread of fungi.
The risk to be infected by nail fungus will be higher if you have a condition called onycholysis (the separation of the nail from the skin beneath).
You can get a nail fungus infection when you come in contact with the fungus and it begins to grow on or under your nail.