glute

I was doing some moving over the weekend helping a buddy with a couch and when I picked up the couch something popped in my lower back I initially thought it was along the spine but then when I started to touch the area it's the very top of my butt area my glute muscle the problem is it hurts to...

everytime I inject steroids-store steroids I get some painful welts on my body I did one in my glute the other day and its been 3 days and I still cannot even sit or walk I am worried this is dirty gear. Is it normal to have this every injection?