6 weeks no problems... week seven, weird.

[Sworder]

Sounds like you are trying to aspirate in scar tissue. If the muscle tissue starts feeling hard or different when you are poking through it, maybe time to rotate injection sites.

[MuscleInk]

Sounds like you are trying to aspirate in scar tissue. If the muscle tissue starts feeling hard or different when you are poking through it, maybe time to rotate injection sites.

My thoughts exactly. If you were in a vein you should have aspirated blood unless the vaccum created when you tried to aspirate was collapsing the vein. The blood on withdrawal would support this but that also could be a vein you hit on the way through or out. What size bore and length of pin are you using?

I used to do quads weekly until I had a severe infection that took me almost 5 weeks to recover from with a lot of bed rest and antibiotics. Now I rotate between pecs, delts, and glutes.