What's disadvantage of insomnia?

Insomnia Consequence: Hypersomnia decreased attention concentration decreased memory impaired judgment higher risk of motor vehicle and other hazardous instrument accident tiredness decreased immunity etc.

Insomnia: Symptoms of sleep deprivation can include irritability, feeling tired, poor concentration, decreased memory, changes in appetite, poorer ability to handle stress, lack of comprehension with social interactions. In severe cases it can lead to pyschosis!