I gave my glutes a rest from injections and when I went back to do a injection I couldn't push the plunger down it was hard as a rock in both glutes, I had to use just about all my strength to get that 1 cc in, why is that? is it possible to have that much scar tissue there that it takes that much presure to get 1 cc into that muscle. I'm thinking I will use 1-1/2 inch next time instead of a 1 inch what do you think.