<s>[INST] Hello..Iam 46 yrs male..i undergone CABG (4 grafts) six weeks ago..Still Iam having chest tightness aronud sternum on either sides. which causing me discomfort at the time of sleep. Iam forced to sleep only in flat position.. Rest of the things are ok..iam not diabetic. My BP is normal...I walk for 30 mts regularly...using medicines as advised by doctor...Please advice for my chest tightness....Iam 5'5"..weight 66 Kgs [/INST] Dear Sir,Don't worry. If you underwent CABG recently, you may have some pain in sternum, as they have cut it and it need time to recover. It is very individual, in some patients pain disappears quite quickly and some patients may have pain for months. Pay attention if there is no inflammation, redness or soreness in the area of the surgical cut, don't worry, pain will disappear gradually.Take careCome back if you have any further questions </s>