When people swish with mouthwash, they like feeling the burn because to them, it sends a signal that it's doing something. It reinforces the placebo effect. When you submerge the body into cold water, you will have an activation of your sympathetic nervous system. And just by that, you'll have lower blood flow to the brain,. which is like 30 to 40% compared to when we are not in hot water. Some find it quite painful to go all the way up to the neck or almost up to the, what is this called? The chin. So depending on how where you are, are you able to get up right away? so it really depends on what you're