As a general rule of thumb, 7-8 hours of sleep is considered as healthy sleep, right? On the other hand, some people do well with just 5-6 hours while others feel sleepy even after 9-10 hours of sleep! Why? Because our genetics play major role in how much sleep we need (like they play role in what hair color we have). Sleep need varies from person to person in the range of 6-9 hours. Apart from this, sleep requirement can be affected by sleep disorders like hypersomnia (where person feel sleepy even after 10+ hours of sleep), depression, mental health, sleep debt (means you are cutting your sleep for a considerable time) & medicines you take. Well, If it’s a DNA issues, it’s normal. Nothing can be done about this! But if it’s a medical issue, seek help. Anyways, when it comes to sleep, it’s best to listen to your body needs so that you don’t end-up in accumulating sleep debt!