Is it possible to inject insulin into your scalp?

Not a good idea.: Usually Insulin is given in places where there is some significant fat like arm, abdominal wall, thigh etc, but skin is easy to penetrate with Insulin needle without much pain. In the scalp the skin is thick, fat is there but less when compared to other locations .Thick skin when penetrated with a needle , will be more painful and also the bore of the needle should be high for that thick skin