I feel like im doing something wrong, almost every time i try to aim for ventrogluteal i end up with a somewhat painful bump, no PIP, but it is irritated and hurts to touch, if i put it more toward the center of my back, no pain, lower down in the dorso, also no pain, no bump either, just a kinda marble sized deposit that isnt visible and has no feeling at all. Same needles so presumably same depth, i want to use that spot so i can rotate more but i cant figure out how im messing it up. Injection angle? Do i need a 27g 5/8 for that spot in particular? Anyone elss dealt with the same? Input is much appreciated