Have you snapped at a partner or child? Is work or school making you frustrated? When lacking sleep, a person sometimes becomes irritable. While you may just think that you are having a bad day, you might be snapping because you did not receive proper sleep. Getting a full seven to nine hours of sleep greatly impacts a person’s mood. With sleep apnea, the frequent disturbances in sleep affects the quality of sleep. Therefore, your sleep might not feel refreshing, even if it goes on for eight hours. When you are tired, it may be more challenging to deal with unforeseen circumstances. This might lead you to snap or feel irritable more often.