Infections begin when the body is invaded by microscopic organisms such as bacteria, viruses, and parasites that do not naturally occur in the body.Skin infections are usually caused by three different types of germs including: bacterial, viral, and fungal. Many skin infections are mild and can be cleared in a few days or weeks with home remedies or over-the-counter medications. However, other infections require professional medical attention because when left untreated, they can become severe. For example, a skin infection that spreads to the bloodstream or bone can become life-threatening. By taking the proper precautions, one can learn how to stop the spread of germs and reduce the likelihood of skin infections.