Does smelling rubbing alcohol or putting pressure on your wrist for 30 secs cure nausea?

Does it work for you. ? Not something I have ever heard of, and likely does not work for most people. We have very good medications for nausea.
Not necessary. It might work for some people. I know some people try acupuncture on that area or wearing robber bend. From my experience it does not work for most of my patients. Nausea is a nonspecific symptom and could cause by many things. If symptom persist i still recommend you see a doctor.
Maybe. Lots of treatments has been mentioned and some of them have some merits. It is harmless to do this so no harm in trying if it works for you.