3. Sniffing onions help when you have headache
It is true. Research has shown that sniffing onions when you are having a headache can actually have a very good effect on your headache overall. It can cure your headache and give you the necessary relaxation when you are having a migraine attack too.
This is one of the things that are going to stay with you long after you have sniffed it. The relief is instant.