How do acupressure bracelets work?

They work by stimulating the acupressure points on our inner arms...3 finger-widths down from our inner wrists.  When we apply pressure to these points, our nerve system is activated and our brain releases certain chemicals aka neurotransmitters (the ones that make us feel good like serotonin or endorphins).  These then block the signals our brain is receiving from the other chemicals that are making us feel nauseous.