question: I noticed a nickel sized bruise on my left forearm about 3 weeks ago. It was only slightly discolored when I noticed it and there also seems to be a small knot under the skin. It hasn t gone away completely and the coloring seems to change. A few days after I noticed it the blue/green tint was gone but it still felt like a normal bruise. The next week the blue/green tint was back and then a few days later it was gone but felt the same. Now the color is bac again. I plan on making an appointment to have it checked, but wanted to make sure I didn t need to do something immediately. Thanks!