What's On My Leg

I was making an RN home visit one day to a woman who was quite dismayed She wanted to show me something and wondered what I had to say She showed me an area on her calf Had been to various doctors who said they had never seen anything like it nor had their staff Nor had I She said it just appeared, no pain no injury, no burn, no swelling " so what the hell is it ?? " It looked like a square, black grid she tried to keep it covered and hid I told her there was only one explanation ###### ALIEN IMPLANTATION ###### ( true story--we had a good laugh--but this # sign is what it looked like !!! SO WEIRD !! #####