Many people suffer through the February "blahs" each year but recent research indicates just as many people may be affected by a summer counterpart period.

Health magazine says a study shows seasonal mood swings could be an organic mental disorder called "seasonal energy syndrome (SES)." It affects some people in the winter months (causing lethargy, overeating and oversleeping) and others during the summer (causing anxiety, agitation and insomnia).Researchers have had some success in treating SES patients with seizure-control drugs most commonly used on epileptics, who show many of the same symptoms.