These headaches have been further sub classified by the ICHD2 into * Headaches induced by acute<unk>  use or exposure * Medication overuse headaches (MOH) * Headaches<unk>  to chronic medication use * Headaches<unk>  to<unk><unk>
Headache attributed to a substance or its withdrawal
Sudden unexpected death in epilepsy
Acute behavioural disturbance
Recurrent brief depression
New daily persistent headache
Clinical descriptions of chronic fatigue syndrome
Sleeping disorders following traumatic brain injury
Long-term depression