(By Rob Wile, rwile@islandpacket.com) Some swimmers on Beaufort County's beaches are finding that the cool, refreshing waters sometimes pack a sting.It's the season for jellyfish and stingrays. Last year, Hilton Head Hospital treated 121 patients with stingray injuries and about 50 with jellyfish stings, according to Dr. Robert Clodfelter, the hospital's medical director of emergency services.