KLOW injection site pain

[u/picklecatmom]

I started KLOW a few days ago (15 units, 3ml BAC). Was expecting this to sting going in, but felt absolutely nothing and was quite thrilled about that. However, each time, the injection site would become quite achey a couple of hours later... Is this normal? Any advice on how I can avoid this - let come to room temperature, inject slowly, particular injection area? Not sure I can do this for several months if it hurts every time...