So it a matter of quality of sleep not the time spent in sleep ,and if you have an interrupted sleep then you will probably been sleepy even if you sleep 10 hrs .
You might feel sleepy and tired throughout the day may sometimes indicate a medical condition ranging from simple such as anemia ,bad diet (rich in fats and low in proteins and carbs,junk food ,low fiber diet ,...),infections ,and to more serious medical problems, dehydration ,if you don't take much water you must drink 8-10 glasses of water ,weather can contribute to such laziness ,and in such case you can boost your alert in drinking much water and juices rich in vitamin c
If the situation last long check with a doctor to undergo some tests especially if there are other symptoms associated with .
The most common reasons for feeling tired are about daily habits.
>Check what you eat, Reaching for caffeine and sugar can backfire, leaving you more fatigued as your blood sugar levels fluctuate wildly. Instead, go for a balanced, healthy diet replete with fruits, vegetables, and lean protein. Most people feel like they're less tired if they eat a healthy diet.Eating healthy also means you'll carry less weight, and obesity is a big contributor to fatigue.
>exercise. If you think that exercise would just make you more tired,Thhen you must know exercise breeds energy. Almost all the studies that have looked at this question have found the same thing: Sedentary people who start exercising feel much less fatigue than those who stay idle. It's one of those surprising truths: move more and you'll get more energy.
If you still feel exhausted, you'll need to check with your health care provider to look into it. Chronic tiredness is linked to many different medical conditions, such as:
A blood test can diagnose anaemia, and doctors will normally recommend supplements along with dietary advice. If your blood count is at the low end of normal, but not anaemic, boosting your iron intake could make you feel better.
> Deficiencies in key nutrients, such as potassium. Again, this is easily checked with blood testing.
>Thyroid problems. Over- and under-active thyroids both can cause fatigue,A blood test for your level of thyroid-stimulating hormone can help evaluate your thyroid function.
> Diabetes. People who have uncontrolled diabetes,If you feel draggy and you're also having blurred vision or lots of urination, you should get that checked with a blood test.
> Depression. if recently you have been too an emotional shock or If your feelings of exhaustion are accompanied by sadness and loss of appetite, and you just can't find any pleasure in things you once enjoyed, you may be depressed. Don't keep that to yourself. Your doctor, or a therapist, can start you on the path back to feeling better.
> Sleep problems. If you never feel rested, and nothing seems to fix that, you might look into visiting a sleep lab, especially if you snore. Snoring can be part of obstructive sleep apnea, in which people briefly stop breathing several times a night. There are treatments for that.
>Undiagnosed heart disease. Tiredness can be a sign of heart trouble, particularly in women, If you have trouble with exercise you used to do easily, or if you start feeling worse when you exercise, this could be a red flag for heart trouble. If you have any doubts, see your doctor.
But again, start with the basics: your quality of sleep, your diet, and your activity level. Sometimes the simplest fixes are all it takes.if you think your diet is improper you can take multi vitamins consisting of B complex and others and if anemic you can choose one with iron added .