Managing Post Injection Pain After a Week Injectable GHK Cu: Beginner's Guide to Copper Peptide GHK Cu HGH & Peptides Deus Medical Hard Lump Under Injection Site: Treatment, Causes, and More MyEczemaTeam If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend