So let's start off by saying SWIM taught herself how to IV heroin. SWIM has mostly very deep veins that are not visible. It was a really tough go at first and SWIM busted some veins. Now on SWIM's arms and hands, the two veins she can track seem to go flat at places and then bump up again. And when SWIM tries to shoot up in those veins, the same veins she was shooting in before, SWIM can register, but the blood is bright red. SWIM cannot really understand what is happening. SWIM thought when a vein collapsed, it just flattened out and there wouldn't be pressure enough to register properly. No blood goes into the syringe until SWIM is in. There is no doubt. SWIM can feel the needle is in the vein. It doesn't hurt or form a blister. The rush seems less, but SWIM can't really tell because the last bag she got is really bad quality compared to what she is used to. Has anyone had a similar experience. When SWIM googles "bright red blood" the only info that pops up is about hitting an artery. SWIM is 10000% sure it is not an artery.