If you’re referring to the popular “Vicks on the feet before bed” claim, the “brilliant reason” usually promoted online is that it can stop a cough, especially a nighttime cough.
However, there isn’t good scientific evidence that applying Vicks VapoRub to the soles of the feet treats coughs. The product is intended for topical use on the chest and throat for temporary relief of cough associated with the common cold, according to its labeling—not the feet.
If someone wants to use it for a cold-related cough, they should follow the product label and avoid applying it to broken or irritated skin. Do not put it in or under the nose, and don’t use it in young children unless the label specifically permits it.
So: the foot remedy is a popular home-health tip, but it isn’t a proven treatment.
