Bacterial and fungal infections frequently result from artificial nails, whether applied at home or in a salon. A bump or knock to a long artificial nail may cause it to lift from the natural nail at the base, leaving an opening for dirt to get in. Also, as the natural nail grows, an opening develops between the natural nail and artificial nail. If this space is not filled in regularly, it can increase the chances for infection. Bacterial, fungal and viral infections also can occur from using insanitary nail implements, especially in a salon, where the same implements are used on many people.
Unclean implements are especially dangerous if the skin around the nail is broken.
If the cuticle is cut or separated from the fingernail, infectious agents can get into the exposed area. This is why dermatologists recommend leaving cuticles intact. Symptoms of an infection include pain, redness, itching, and pus in or around the nail area. A blue-green discoloration signals a fungal infection. If an infection appears while wearing artificial nails, they should be removed and the area cleaned thoroughly with soap and water.