See your healthcare provider if the symptoms are serious or do not clear up. Rhus Dermatitis (Poison Ivy, Oak, and Sumac) Rhus dermatitis is a type of contact dermatitis. This itchy rash is caused by ...

You must consciously fight dead air space all the time. Each time you look at a scene again look at it as something new. Also, don't just look at solid objects (e.g. a tree); look through the spaces ...