15 days ago, suffering feverish like symptom with no fever, no cough, no symptoms. Treated with cold medication and symptom gone. After 15 days, body feels acute weakness and unable to stand. Severe weakness with loss of appetite.
Sugar test done- normal, haemoglobin-13, no urine infection, BP-120/80. Spo2 -98, pulse- 75,Symptoms seems better with glucose water for some time. What is the reason? What test should I take to identify underlying disease or reason?