Concerns about side effects and indentations from anti-inflammatory injections to soothe pustular acne and painful large pimples

My skin is usually fine, but whenever my menstrual cycle, insomnia, or stress reaches its peak, large, hard, and painful pustular pimples break out around my chin and mouth. Even when I try to squeeze them out with my hands at home, no sebum comes out; instead, the surrounding skin just turns red and swells, leaving scars, which is incredibly painful. I am wondering if receiving an anti-inflammatory injection (Triaamcinolone) at Maypure on these painful, large inflammatory areas will cause them to subside within a day or two. Also, I have seen reviews mentioning a side effect where the skin sinks in at the injection site; I would like to know if this fills back in over time and if the injection is administered safely without any side effects.