Sleep disorders can significantly impact individuals dealing with addictions, relationship issues, or depression. For example, insomnia can worsen mood swings and decrease the ability to cope with stress, potentially exacerbating symptoms of depression. To support someone struggling with this problem, I would focus on identifying underlying causes of sleep disturbances and implementing lifestyle changes to promote better sleep hygiene. This may involve creating a consistent bedtime routine, reducing caffeine intake, and practicing relaxation techniques.