Hey there bro, are you pulling back on the plunger before you inject. You shouldn't see any blood if you do.

The blood may...MAY... look especially red because there's gear mixed in with it which gives it a real bright look.

With perfect shoulder injections you won't bleed. They aren't all perfect, but if you do bleed (usually I know by the resistance of the needle going in whether I will or not) have some kleenex ready to put pressure on the injection site. The more you bleed the more gear you waste (edit: and normally the more it will hurt after).

Check the pics on the main site to see where you can find the sweet spot in the shoulder.