<unk>  means the inability to sleep or a total lack of sleep. The word<unk> ' comes from the Latin word "in"  which means no and "somnus" which means sleep. It is critical to find out if the patient is really suffering from<unk>  and if there is a problem in falling asleep or if it is difficult to remain asleep or return to sleep after awakening. Finding out the underlying cause of<unk>  is also important.<unk>  can be idiopathic or could be due to circadian rhythm sleep disorder, depression, stress, anxiety, substance use, obstructive sleep apnea, poor sleep hygiene, restless leg syndrome or due to medications or general health disorders.<unk>  can be divided into mild, moderate, and severe. In mild<unk>  patients complain of an insufficient amount of sleep or not feeling rested after the habitual sleep episode almost every night which is accompanied by little or no evidence of impairment of social or occupational functioning. Moderate<unk>  means an insufficient amount of sleep or not feeling rested after the habitual sleep episode every night which is accompanied by mild or moderate impairment of social or occupational functioning. Severe<unk>  presents with severe impairment of social or occupational functioning and is associated with feelings of restlessness, irritability, anxiety, daytime fatigue, and tiredness. In the approach to treating<unk> , a thorough history review is critical. Patients should be asked about their sleep routines, sleep quality and the duration of the complaint, daytime naps, medications they take and past medical and mental histories. If depression or alcohol abuse is suspected, further questions should be asked. Laboratory investigations to rule out anemia and thyroid disorders could be required for selected patients. Non-pharmacological and pharmacological treatments are two certain treatment approaches for<unk> .
Insomnia
Parasomnia
Hypersomnia
Dyssomnia
Sleep hyperhidrosis
Euphorbia
Sleepwalking
Snatiation