Mitigating GHK Cu Injection Pain: Tips and Tricks Gabriel Alizaidy, MD, MS posted on the topic LinkedIn 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 Subcutaneous Injection: What It Is and How to Give One Subcutaneous Injection Sites and Instructions for Safe Self Administration Subcutaneous Injection Sites and Instructions for Safe Self Administration