 [ Symptoms ] my stool comes out normal no pain and soft but when it goes to toilet water after few seconds it starts dissolving i had diarrhea couple of months ago which lasted more than a month doctor tested everything blood stool ultrasound etc and all came normal i do not have any pain all good for me but since i have been looking at stool more  for blood color etc etc i feel like still not normal as compared to past i have no pain but what i notice is after my stool land in water in toilet normal soft few seconds later it starts dissolving into it is this normal or it should stay intact [ Disease ] yes smoking causes blood levels of carbon monoxide to go up which may in turn increase risk of damage to artery linings tobacco use also raises ldl bad cholesterol and lowers hdlgood cholesterol constricts arteries and further decreases blood flow to tissues and makes blood more likely to clot even secondhand smoke seems to raise risk