Recently I feel sleepy whole day, why?

Causes and treatment of fatigue and sleepiness:
In fact, there are many reasons for the aforementioned condition and symptoms, and it is not possible to judge one of them without resorting to a clinical examination and taking a medical history. Among the causes are problems related to the general psychological and mood states. Among the other reasons are lack of exercise and routine. The mentioned problems may be caused by: An imbalance in the body’s hormones as a result of thyroid gland diseases or adrenal gland dysfunction, also pressure and diabetes diseases are among the causes, blood diseases such as anemia or infections in the body must also be excluded, among other reasons related to the intestines such as malabsorption or irritable bowel, also with regard to Some diseases of the body, such as tumors and diseases of the connective tissues, such as rheumatoid, osteoarthritis, and the like. Some people who may not reach a specific diagnosis may be classified under the diagnosis of chronic fatigue syndrome, but at least 6 months must pass from symptoms.
As mentioned previously, there are many diagnoses, from simple and easy to treat, to the most complex. The key to the diagnosis is the medical evaluation.
evaluation:
Diagnosis is done through the medical presentation to the doctor anddi taking a detailed medical history and a careful medical examination of what you may suspect through history, excluding organic problems through a physical examination and carrying out the necessary analyzes such as blood tests and organ functions in addition making nessesary imagings.
Accompanying symptoms:
• fatigue
•    Poor memory
• Poor focus
• muscle pain
•     pain in the joints
•    sore throat
• headache
Fatigue that may last for hours
• Fatigue or tiredness does not improve with sleep
•    Other
Advice
do the necessary evaluations and tests