You know how important water is for human beings but sometimes it can be hazardous. Do you think I am joking?

Then you do not know about aquagenic Urticaria which is an extremely rare diagnosed form of physical urticaria. It appears in response to any type of water (including normal water, sweat, tears etc) at both cold temperatures and hot temperatures. It is also sometimes also referred to as water urticaria and aquagenous urticaria.

No doubt it is very annoying  because avoiding water completely is not really possible for humans.  However, you can do certain things to minimize the damage done by aquagenic urticaria, mentioned in my detailed article here.