There are two main categories of hypersomnia: primary hypersomnia (sometimes called idiopathic hypersomnia) and recurrent hypersomnia (sometimes called recurrent primary hypersomnia).

Hypersomnia. This condition is sometimes called sleep drunkenness

Hypersomnia can affect individuals of any age or gender, but it is more commonly diagnosed in young adults. There may be a genetic component to hypersomnia, as it can run in families. Additionally, individuals with certain underlying medical conditions or mental health disorders may be at a higher risk of developing hypersomnia.

Hypersomnia means too much sleep. Hypersomnia can be a symptom of depression.

Recurring hypersomnia involves periods of excessive daytime sleepiness that can last from one to many days, and recur over the course of a year or more.