Low Tech Remedy

Jenn C, who is fighting a nasty cough, heard two different people recommend the same solution for sleep in the same day, so she tried it and it worked for her!

She put Vicks Vapor Rub on her feet at bedtime, then her socks, and then slept better and got more rest than she had in weeks.

What do you think?  Have you done this?  Why would it work?  As a reflexology-related effect, as Jenn suspects?