 [ Symptoms ] can poison ivy rash return same place after 2 months  rash returned same places on arms after 2 months since had first rash  have not been any where near any plants no pets to come in contact with poison ivy any one ever hear of this happening [ Disease ] i have never heard that people who routinely live in cold temperatures eventually habituate and their bodies get used to it your blood does not get thicker if you are cold blood gits thicker if there is an over production of platelets or if there is some other issue with the blood even in a cold area your body is still somewhere in the neighborhood of 98 degrees because your body burns fuel to keep itself warm people in ancient japan for example regularly lived in unheated homes with only a charcoal brazier and thick quilts on the bed in winter they tended to be quite healthy the human body is amazingly adaptable