My 15 year old son was helping his Dad set up our live Christmas tree on Monday evening where he came in contact with the branches while holding the tree. We noticed some red welts/pimples on his arms, but now they are all over the trunk of his body. He also has some bigger red, scaly dry looking patches maybe a 1/4 of an inch or less in circumference. They don t see to be bothering him or itching. I gave him a dose of benedryl last night but they were still there this morning. He has no known allergies, although he s never been to an allergist. As his Mother I get red welts/pimples when I m near certain trees but never like this.