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 Peptide Therapy for Pain Management and Healing Core Medical & Wellness Subcutaneous Injection Sites and Instructions for Safe Self Administration A Deeper Dive Into The Recovery Peptide Infuzed IV Bar Subcutaneous injection: Definition and what to expect