Hello Docs, my Mother is 53yrs old. A couple of weeks back she fainted twice so we had admitted her in the hospital. She was diagnosed with lower respiratory tract infection. We also got her brain MRI, ECG, Lipid Profile, Liver and Kidney function, sugar tests for fainting and all came out normal. The doctors said that the fainting might be because of fasting or BP fluctuations. She is feeling fine now and the infection is gone. Yesterday, when she was going for a walk, she said her head felt heavy for a few seconds and then she was alright. Did she feel this because she went for a walk in hot sun or anything else which I need to worry about? Please advise.