Greetings Doc, I am 30 years old male, around 6 feet tall & weighing 90Kgs. Of late i have started feeling a split second numbness sensation around my throat & face/ blackout sensation while swallowing saliva alone. It s not there while swallowing food/chewing anything or even drinking water. It s like something has got stuck to my upper throat. Sometimes, immediately after the numbness, i have difficulty in breathing for 1-2 seconds & my chest feels heavy. I was diagnosed with Hiatus Hernia (by birth) in 2005 and underwent ballooning . Kindly advise. P.S: I am a regular smoker - Upto 20 Cigs a day or more.