For starters, I am a bleeder. So there is hardly a time after a shot when I don't have at least a drop. (BTW - I do the outer thigh). Sometimes the drop or two is a dribble that stops after the BandAid goes on. Later when it comes off in either case there is just a tiny spot or a bigger spot. In other words hardly nuttin.
And then.... On occasion I'll nick a vein. When the needle comes out blood may even spurt out a bit

Just as Murphy's Law dictates right onto my clothing. Again, a little pressure and a bandaid later nuttin. Just a bandaid with most of the cotton red.
I always asperate before injecting so I know I'm not in a vein. With all the spider veins I do have you'll think I'll easily miss them but somehow I can't