x2head gasket if it doesnt go away
White smoke is coolant/watergd these people just throw out generic problems....
If the smoke goes away after warm...(and im assuming this is white smoke) then you are FINE. If the smoke persists.... then you would need to look and see what color it is.... if its white... prolly just running rich... and prolly fuel...(you could smell the exhaust)
blue and black smoke are gunna be bigger problems... like burning oil due to bad piston rings... or head gasket problem.... or other issues.... if the smoke goes away... and the car is running fine... and all fluid levels are ok... and no check engine light... then you are fine.