DICKINSON (AP) - There are a lot of busy bees in North Dakota.

With the change of seasons, Dickinson medical centers are seeing an increase in the number of bee-sting victims.

Dr. Michael Cassidy of St. Joseph's Hospital and Health Center's emergency medicine said most stings can be treated at home. He said trips to the emergency room usually aren't necessary.

Cassidy said these symptoms warrant an emergency room visit: difficulty breathing, chest tightness and wheezing, weakness, fainting, feelings of dizziness, a feeling of swelling of the lips, tongue or throat, rapid spreading of itching and or redness, fever and signs of infection.

Jan Knodel is an entomologist for North Dakota State University's Extension Service. Knodel said people are more likely to be stung in August and September as bees and all flying stingers become more aggressive.