Excessive daytime sleepiness can have many causes, but one of the most common in India is obesity leading to obstructive sleep apnea. Some patients, those who are lean and thin, can also have OSA. Other common causes of lethargy and fatig can be hypothyroid anaemia and other sleep related issues.
Next Steps
you can consult a neurologist or respiratory medicine doctor who has additional qualifications in sleep medicine .
Health Tips
you can follow sleep hygiene and it can help in some patient but for the detailed evaluation is needed to know the exact reason