eli5 – How does immune system decreases when you are exposed to cold but ice baths can be healthy and boost immune system?

Question

eli5 – How does immune system decreases when you are exposed to cold but ice baths can be healthy and boost immune system?

In: 2

Answer 1

They are the same. Both cases trigger your immune system and make it go to work and neither is healthy while it lasts, but if you survive, it trained your immune system and made it stronger. But of course you shouldn’t intentionally expose yourself.