Workers who suffer from fatigue, but do not have other sleep apnea symptoms (e.g., waking with a very sore or dry throat, loud snoring) or risk factors (obesity, neck diameter, fullness of soft tissues in the oropharynx), may not need a polysomnogram (sleep study). While a polysomnogram is an essential tool in diagnosing many sleep disorders, it is not usually necessary in assessing insomnia. If lack of sufficient sleep or the job schedule is affecting the patient’s sleep patterns, then behavioral modification and attempts to modify the sleep schedule and improve sleep hygiene should be attempted first.