I have gone to a private lab for checkup while giving blood sample the technician unable to drew blood from first attempt with out withdrawing the neddle he attempted once more and then drewed my blood at the time the pain was unimageinable after that i was having some pain for 6 hours rigth now i am having mild pain but i am worry about this greenish patch/spot what is that do i need to worry? Pls help Doctors(i have atteched the pic first big circle is for the patch and the small one is at the injected site) THANKS.