I've found that the best scientific way to get rid of hiccups is to activate your vagus nerve so it relaxes your diaphragm. The way to do that (or just relax your body in general) is with '458'. Gently breathe in for 4 seconds, hold your breath for 5 seconds, then slowly breathe out for 8 seconds. Keep repeating that cycle and the hiccups should stop fairly quickly.
If you press/ hold your chest over the heart with one hand, and press your lower abdomen/stomach with the other hand at the same time, you can also activate the vagus nerve.
you can also have someone gently squeeze the back of your neck to reset the diaphragm but it's a bit hit and miss if you don't pinpoint the exact spot
@dduane has a sure-fire science-based hiccup cure that's worked every time I've used it. Scaring? Laughing? Drinking upside down? Holding my breath? None of those has worked 100% of the time. But Ms. Duane's hiccup cure? Every fucking time.
my cure is slowly drinking orange juice while spinning in a circle and it works every time
