One thing is you put Vick’s vapor rub on your socks and feet. It’s supposed to help clear up congestion. I heard about it when my daughter was a baby, because I couldn’t give her cold medicine. You’re supposed to put menthol on their feet with socks on, because you can’t put it on their chest.
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I had not heard of this, but this sounds like folklore that would be shared more with new parents or babysitters.