Pin spot hurts

[sub5cidxcjj]

I pinned my ghk cu 40 units at 5 it is now 10 and the area (left side of my stomach) is aching in pain burns a little bit too why

 

[pharmaworker616]

did you pin it while it was cold still?

 

[sub5cidxcjj]

I left it out for 5 to 10 mins