its a yes and no question. First off it depends whats wrong with you if you have a upset stomache i recomend weed it will cure it instantly if you have a runny nose and sore throat it can be kinda bad. As for my opinion on toking with a cold i say yes and no the first day of my cold i smoked a blunt and almost threw up the second day i smoked my bubbler and had a great high and forgot about being sick... so idk its good and bad ?