 [ Symptoms ] i have a itchy rash that comes and goes what could be causing this  the rash appears in different areas of my body for an example a rash showed up on my wrist and stayed a while and went away later the same day it appeared on my stomach and then on my thighs etc its itchy while it is present at one point my hands first turned red and then start to itch really bad to the point i had to wash my hands repeatedly i work in the medical field so i wash my hands a million times a day what could be causing this reaction [ Disease ] yes the rash can return to same area months later once you have been exposed to this plant and even thought the rash itself may have long since healed or faded away the underlying skin proteins remain sensitized to urushiol for quite some time in some cases several years hence the slightest newest recent exposure to urushiol in certain individuals will cause you to experience for a second or third time a newer rash breathing in the flower pollen also in certain individuals will cause them to develop a rash exposure frequency and time interval duration between each successive pi exposure to a large extent will determine how severe your rash outbreak will not only be but how long it will last