I've been running sust 300 every 4 days, I've only been injecting in my glutes because the pain is less there, my 8th shot left me crippled with a swollen glute and hard as a rock! The next injection I did 1/2 ml in my right quad and 1/2 in my left, but I basically could not walk for a week. The rock eventually went away, it was not an infection, but does anyone have some advice on where the hell I should be shooting and when to rotate sites? My 10th shot went back to my glute, it seems OK and its been a day.