I was working in yard and later treated for poison ivy last week of June, 2016. About 2 weeks later, I developed a bruise on my forearm. I thought I hit something and wasn t concerned other than the bruise the size larger than a quarter was over what I know to be an old age or liver spot . I am 69. That bruise appeared initially as a dark purple color. It is a month later and the bruise has not gone away except that it is reddish purple and surrounds the liver spot . Because of the new shape (an oval ring), and the amount of time I have had it, I am concerned that it could be lyme. My PC doctor is 75 miles away.