As expected, dermatologic diseases account for a relatively small fraction of all ED visits, about 3.3%. Although it has not been shown previously, it is not surprising that the skin infections are the most common cause of ED visit and hospital admission from ED. The predominance of skin infections among causes of visits might explain the distinct seasonal variation observed in this study. The summer peaks of ED visits suggest that seasonal factors such as heat and humidity, increased outdoor activities, and higher frequency of insect bites might be implicated as triggers. Of note, a very different seasonal pattern in ED visits has been reported for other conditions, such as asthma, with peaks of visits in the fall, and heart attacks, with peaks of visits in winter months.