Brownish spots on hand

Thursday April 15, 2010 I noticed that I had a small brownish orange spot on my thumb on my left hand toward the outside. I examined the spot and found that it was surrounded by dark purple and red lines, and brown spots that stretched from the top of my thumb just under the nail and around almost to the knuckle of my pointer finger. There is no consistency with the shape. Toward the top of my thumb there are rust colored spots, toward the middle are the purple and red lines that appear to pool together in the middle around my thumb knuckle and towards my pointer finger knuckle are about 30 small brown dots a little larger than a pin prick. Through some areas of the pooling there appear to be skin colored straight lines. There is no itching, pain or discomfort. I have not found any other areas like this on my body. I am curious about what this might be. Thank you for taking the time to view my question.