This is called pruning! It is a normal Occurrence and every human being experiences it! It’s just where ur fingers have been in water for an extended period of time the blood vessels constrict beneath your skin causing this :)
Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour)
Loss of consciousness...
all of the others are not emergency situations
