I am 39 male from Mumbai. I am 5'8 tall and weight 88 kg and have a problem from past 10 years or so even when I weighed 80 kgs and here is my brief. Everyday, I wake up feeling good. I have energy and mind is somewhat sharp and happy for half n hour. After an hour of standing or waking up, I feel crashed. I have heaviness in my eyes and feel as if I have a hangover without head ache. Very intolerant and I battle through this everyday. My basic blood tests such as cholesterol are normal. No diabetes. However vitamin d is 6. B12 is normal. I do take Antacids for my GERD and gastritis everyday which is another problem that I deal with. Blood pressure is 125/ 80. After standing up, it might variate. When I take quick 15-20 min nap, it goes away for 5-10 mins and then gradually comes back again. I also play badminton everyday and burn around 600 calories. After playing I sometimes feel better maybe because of fast blood circulation? Back in the days, l used to be fine in the evening but now, I feel like this all the time. I am looking for real diagnosis and would really appreciate if someone can help me out.