Insomnia is a sleep disorder causing difficulty in falling asleep, staying asleep, or poor sleep quality. Symptoms include fatigue, irritability, and poor concentration during the day. Treatment includes lifestyle changes, behavioral therapy, or medication. Examples of lifestyle changes are maintaining a sleep schedule, avoiding screens before bedtime, and reducing caffeine and alcohol. Behavioral therapy like CBT-I helps improve sleep habits and reduce symptoms. Medications for insomnia include OTC sleep aids and prescription drugs, but these should be used only under medical guidance. A personalized approach based on underlying cause, symptoms, and lifestyle is the most effective treatment for insomnia.