I went for a routine blood test. Samples were taken from my left arm and a small circular band aid put on the part where needle was inserted. In the evening when I removed band aid I found the area around was all blue as if some arteries had ruptured and there was blood clotting in an area of around 1 inch circular. I feel discomfort when I lift some heavy weights with this arm. Otherwise no pain or irritation etc, unless I press on the effected area. Do I need some topical application or will it heal on its own ? Please advise.