1- leave the frag out of the fridge for 20 or 30 mins before inject. it should be room temp when you inject
2- make sure the alcohol on your skin completely dry before inject
3- use ba instead of sterile water.
the first two things are what the nurse who taught me how to inject my daughter's gh told me to do to lessen the sting. it has helped, according to my number one source-my lil girl!