You could possibly still be tired. Maybe you didn't sleep a lot the last night or didn't sleep deeply enough. It could be medications or vitamin deficiencies. Also, some people need to sleep more hours than others.
If you wake up still tired you may have a sleeping disorder. It is a common disorder and you shouldn't feel worried about it. If you don't feel tired when you wake up you were just really tired. If you have any more questions ask me on my bio page.
If you need to get 12 hours of sleep then you should see a doctor. It is not normal to feel tired all the time. You may be anemic.
It does not matter if a person goes to bed early or not to get a good nights rest. A person can feel tired even if they go o bed early. What matters with sleep, is how many hours a person sleeps.
Some is better than none.
Tired
If you feel tired during the day as a teenager, you probably need to sleep more! If you are sleeping more and still feel tired, you might want to adjust how you eat. After that, if you are STILL feeling tired, you might want to go to the doctor to see if they have additional recommendations, or potentially get tested for Mononucleosis. Mononucleosis
If you're tired after sex, go to sleep!
angry
Snoring is one cause. Sleep apnea is another. Depression is another. Some people with mentally or physically stressful work need more than 8 hours. Being pregnant. Many other things.
It all depends on the person. Some people still may not sleep. Basically, the answer to your question, is it varies. You could sleep for 3 hours, 7 hours, or even 12-20 hours. It depends on the person. If you are like most teens, If you are a teen, Then you can sleep for about 14 hours and feel recovered for the most part. If you are like me, You can sleep for 9 hours and feel perfect :D
No, I tend to sleep when I'm tired and feel better afterward.