I get my si joint injected about every 9/12 monthes. Not really a big deal at all. It’s guided under X-ray. Takes just a couple of minutes. Feels like pressure in the area to me, but I have a pretty high pain threshold, not because I want to, but because I have to, lol.
Afterwards I try to not do much for the rest of the day and keep putting ice on it. There isn’t really a joint per se to inject into, which is why they do it unde X-ray. You want the cortisone to stay there not move to the rest of the body, hence the inactivity and ice. I find it improving pretty much right away(might be inactivity and ice though). Can take up to a week to improve and I usually see that gradual improvement.
Once in a while it doesn’t stay there long enough and I end up getting one say in 2-3 monthes. It helps a lot of me
I also find using a cane helps if I need to walk a lot. Never had really any help from pt