A representative of the Canadian Tobacco Manufacturers Council agreed to make exploratory contact, it says
They can be painful but usually resolve without treatment in a few days

Coolant Leaks Into the Engine Often caused by a blown head gasket , cracked cylinder head , or warped engine block Coolant gets into the combustion chamber and burns, causing thick white smoke Usually comes with signs like engine overheating , low coolant , or bubbling in the reservoir Burning Oil Caused by worn piston rings , bad valve seals , or a clogged PCV valve Produces blue or gray smoke from the exhaust It may be worse when accelerating or starting the car Youll often notice your oil level dropping faster than normal Overheating Engine Often due to low coolant , a broken thermostat , or a failed radiator fan Can produce steam or smoke from under the hood Overheating may lead to severe engine damage if ignored Fuel System Problems Issues like bad injectors , faulty sensors , or clogged air filters Result in black smoke from the exhaust Usually, a sign of a rich fuel mixture , the engine is burning more fuel than it should Table: Smoke Causes & Clues These are just the most common issues

Most of centella's magic comes from the four big compounds (Asiaticoside, Madecassoside, Asiatic Acid, and Madecassic Acid)
No Smoking Allowed: If sore throats from smoking cannabis are a regular thing for you, think about trying different methods like edibles or vaporizers