Patients who suffer from both allergic rhinitis and obstructive sleep apnea (OSA) may experience escalated symptoms of stress and fatigue. In a paper presented at the 2009 American Academy of Otolaryngology - Head and Neck Surgery Foundation (AAO-HNSF) Annual Meeting & OTO EXPO in San Diego, researchers studied 34 people who were diagnosed with obstructive sleep apnea. Among them, 12 people were classified in the allergic rhinitis group and 22 people in the control group.