Fina injections are pretty painful, mainly because it is best to do them ED....I have used homemade fina and IP fina and found the IP fina much more painful....I had several bad cases of fina cough with both....all of my injections with fina were in the glutes as I was too afraid of quad injections due to the pain in the glutes....hell there were days when I could not sit down on my ass cheek because of the damn pain....best of luck, but my pick would be glutes....Peace