<s>[INST] YES I WAS SLEEPING, AND SUDENLY I WAS AWAKE WITHOUT BREATHING THIS WAS HORRIBLE CAN YOU TELL ME WAS HAPPEND ALSO THIS IS THE FOURTH TIME IS HAPPENING, I CANT BREATHE MY WIFE TRY TO DO SOMETHING TAPPING IN MY CHEST, BUT THIS EPISODE LAST FOR SECONDS BUT I FELT I WAS DYING,I HAVE HIGH BLOD PRESURE BUT IS CONTROLED, AND MANY YEARS AGO I HAVE A SURGERY FOR CORRECTION MY SYNOSITIS IN MY NOISE. THANKS [/INST] HIT hanks for posting your query to Chat Doctor.  Most likely you are having a condition called Sleep Apnea. It is a condition where the air way gets collapsed during sleep causing choking.  Most common cause for this is overweight, but sometimes it can happen due to excessive deposition of fat around the neck.  For the confirmation of diagnosis you need to get a test called SLEEP STUDY. If this condition is confirmed then you need to consult either a physician or a Pulmonologist. Depending on the severity of the problem you may be advised for only weight reduction or Weight reduction with oxygen treatment at night. Hope this information was useful to you. Any clarifications feel free to ask. </s>