Insomnia can be termed as a type of sleep disorder. People having insomnia find it difficult to fall asleep stay asleep or both. They won't feel refreshed when they wake up from sleeping either. Hence it can cause fatigue. Other symptoms of insomnia can be irritability and mood changes. Are you unable to get that good night's sleep? Then this one is important for you. According to a study published in the Nature Genetics journal researchers have identified 57 genes linked to symptoms of insomnia affecting 10 to 20 per cent people all over the world. Moreover the researchers also