EILO: Triggers Make an Appointment Refer a Patient Ask a Question Reviewed by J. Tod Olin, MD, MSCS (October 01, 2016) Possible triggers of Exercise-Induced Laryngeal Obstruction (EILO) and are often similar to asthma triggers. However, it is important to know that not all people who experience EILO have asthma. The following are some common triggers for EILO: Strong odors/fragrances Smoke Heightened emotions (stress and anxiety) Upper respiratory infections Some vocal maneuvers (talking, singing, laughing) Changes in temperature and humidity Exercise. People with EILO generally have symptoms that are limited to exercise, although occasionally other triggers can cause problems. Sometimes the triggers are not identified. EILO: Symptoms Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.