If you’re asking about the claim behind “A lady rubs Vicks VapoRub on her feet before she sleeps for this brilliant reason,” the claim is usually that it can reduce nighttime coughing or help with cold symptoms.
Does it really work?
There is no good scientific evidence that putting Vicks on the soles of the feet treats a cough or cold. The manufacturer’s directions recommend applying VapoRub to the chest and throat for cough, or to muscles and joints for minor aches and pains—not the feet. (DailyMed)
VapoRub contains camphor, eucalyptus oil, and menthol. When used as directed on the chest and throat, its vapors can provide temporary cough relief. (Vicks)
Some people report that putting it on their feet and wearing socks helps them sleep with less coughing, but personal experiences aren’t proof that the feet application itself is responsible. A placebo effect or simply the strong mentholated aroma may contribute.
Is it safe?
For adults, applying a small amount to intact skin on the feet is generally less concerning than putting it somewhere it’s specifically prohibited, but don’t put VapoRub inside the nose, mouth, on wounds or damaged skin, or under tight bandages. It is for external use. (DailyMed)
For children, follow the product label carefully; VapoRub should not be used in children under 2 years old. (Vicks)
Bottom line: The “brilliant reason” is most likely nighttime cough relief, but the idea that rubbing Vicks on your feet has a special medical effect isn’t supported by strong evidence. If you want cough relief, use the product according to its labeled directions rather than relying on the viral feet trick.
