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Congestion cure
I've never actually tried the head-under the towel steam decongestant but it makes sense.
How it works is, the change in temperature makes the 'cilia' like hairs more active and helps the body expel the excess mucus.
You may notice your nose gets more 'leaky' when you go indoors on a cooler day. It's the same concept.
The steam helps thin the mucus.
So taking warm showers can also help.
