my mother used to use Vick's vapo-rub for everything. She thought it cured nasal congestion, sinus problems, sore throats, and congested chests. She'd rub it on our chests, necks, and/or under our noses.
Here's the real scoop on that from the Mayo Clinic:
http://www.mayoclinic.com/health/nasal-decongestant/AN01551
Even mustard plasters that we taught how to do in school, were discontinued by my second year of working in a hospital due to the high risk of burns and their general lack of effectiveness.
Sometimes the placebo effect has more to do with this.
Although, there are many good, reputable folk remedies out there. So, it's important to distinguish between the two.
"Why fit in when you were born to stand out?" Dr. Seuss
"Your beliefs don't make you a better person, your behaviour does." (unknown)
"If everyone is thinking alike, then somebody isn't thinking." George S. Patton
The poster formerly known as Writer Mom (stolen from Prince)