| | Conditions & Treatments | Cold & Flu Does carmax work for cold sores? There is no scientific evidence to support the use of CarMax for treating cold sores. CarMax is an automotive company that sells cars. Cold & Flu - Related Articles Can E. coli live in freezing temperatures? How to Clear a Stuffed Sinus Cavity Pregnancy Flu Remedies How to Quickly Get Rid of Stuffy Noses How to Stay Cold and Flu Free How to Control Post Nasal Drip Where can you get a flu jab?