Effect of applying oil to head and having oil bath

[andyarok]

In our place people use to apply vegetable oil for head,( and to body at times) and have a bath after half an hour or so. They say it keeps them cool. A kind of effect induced by mint shampoo.

I don't understand how it works. But would love to know it.

 

[LeroyLaRey]

A guess: the oil dilates blood vessels and the bath opens pores and increases circulation, together they transfer more heat as absorbed water evaporates.