Blood in the tube?

Just a few weeks ago I put my insulin set the Silhouette Infusion Set on my legs. The first time I put it on some blood came back into the tube. Does anybody think that I should be worried about it, or is there something I could do different?

Thank you Dave

Yeah, Dave has put it in a nutshell. I know for me - so far - haven’t had any blood in the tubing yet. Best to change set / site.

You can never really tell where its going to happen… sorry! Sometimes it will happen a day into wearing it, sometimes right away, and sometimes you will pull out the tubing and bleed. Youre poking a hole in your skin…