There are many causes of excessive daytime sleepiness, and Obstructive Sleep Apnoea is one of the most common. Other common causes of excessive daytime sleepiness include:
As with any other disease, confirmation is necessary before embarking on potentially lifelong treatment. Accurate diagnosis of sleep disorders is the responsibility of an experienced physician. Nevertheless, a practitioner who is involved in the diagnosis and management of a sleep patient should understand the differential diagnosis of the most common sleep disorders.