I just applied my second Libre 2 sensor and there was a tiny bit of blood. I’m scared that it’s not going to work now. Is a little bit of blood okay? I used a tiny bit of skin tac when I applied the sensor.
Happens, it will probably be OK, If not, call Abbott and they will replace it.
You have a BLEEDER
Welcome to the world of CRIME SCENE INVESTIGATION.
ACTION: First STOP the bleeding. Hold direct pressure on the hole the blood for 5 minutes by the clock. The reason is two-fold:
 holding direct pressure is what is taught in basic first aid to stop bleeding.
 even after the bleeding has stopped coming from the site hole, there may still be bleeding under the skin surface. Keeping pressure on the site for the full 5 minutes will reduce the [a] size of the bruise, & [b] decrease the damaged ‘real estate’ for new site locations in the next week or so.
CAUSE: A blood vessel was punctured. There have been discussions about the type of blood vessel punctured, artery (carries blood from the heart under pressure - spurts if cut), arteriole (small artery), capillary (where exchanges occur), venule (small vein), vein (generally lower pressure vessel carrying blood to the heart - oozes if cut) with little importance. If there is a hole in a blood vessel pouring blood out of a person’s body, stop it.
OBSERVATIONS: Almost all, if not all, skin punctures made by diabetic care tools will cause BLEEDERS. Finger sticks have even had blood spurt as when milking a droplet for testing. Spurts seen in arterial bleeding. In the side of a finger? Yes. CGM and pump sites may have bleeders. Some occur on insertion, while most show themselves at removal.
BOTTOM LINE: Be prepared for a BLEEDER to rear its surprising head any time you are working with a hole in your ‘hide’.
Hope this helps.