SERIOUSLY! Poison Oak Two Years Old!

I was badly affected on the forearm by mistakenly cutting Poison Oak with a chainsaw. This was two full years ago. It was treated with Prednisone, properly tapering off. With absolutely no possibility of contact since then, the rash has recurred in EXACTLY the same 10" X 1" spot caused by the pitch from the chainsaw blade. Does the Poison Oak oil lie dormant in the skin and periodically resurface?

[jagesh50]

A singular feature connected with rhus poisoning is its recurrence from month to month, and from year to year, even when the affected individual is far remote from all exhalations of the plant. The smoke from burning rhus wood was noticed as early as 1720 by Sherard, Wangenheim, and Kalm, to produce poisonous effects.  Henriette's Herbal Homepage
Thanks for updating my knowlede too.