consult psychiatrist or neurologist for his sleep disturbances and also check whether melatonin helps him or any other safe medications for sleep disturbances

help to practice sleep hygiene Good sleep hygiene practices include: Limiting daytime naps to 30 minutes Avoiding stimulants such as coffee tea and cigarettes close to bedtime Exercising to promote good quality sleep As little as 10 minutes of aerobic exercise Staying away from food that can be disruptive before sleep. Heavy or rich foods, fatty or fried meals, and spicy dishes Ensuring adequate exposure to natural light Establishing a regular relaxing bedtime routine Regular nightly routine helps the body recognize that it is bedtime This could include taking warm shower or bath reading Making sure that the sleep environment is pleasant Ensuring adequate exposure to natural light. This is particularly important for individuals who may not venture outside frequently Exposure to sunlight during the day, as well as darkness at night, helps to maintain a healthy sleep wake cycle Establishing a regular relaxing bedtime routine A regular nightly routine helps the body recognize that it is bedtime This could include taking warm shower or bath reading Making sure that the sleep environment is pleasant, bed and pillows should be comfortable The bedroom should be cool