Hi there, about 10 days ago I had my bloods drawn from the back of my left hand. The doc punctured my vein, the one near my middle finger and told me it's perfectly fine and the swelling will go away. Sure enough it subsided the next day. But I masturbated and a couple of days ago used said hand and felt a slight pain come from the knuckle. I have since not been able to switch to that hand. I noticed that when I press w (keyboard gamer) I feel slight discomfort. And there is a pellet sized ball at the side of the knuckle which is noticeable when stretching out finger. Moves as it's finger becomes outstretched. Even feeling slight discomfort holding my phone as I type this.