What are the risks of administering steroid injections in a patient with osteoarthritis and diabetes?

Hello doctor,

I am 70-year-old, diabetic, and on insulin. I have a pacemaker and osteoarthritis. I had a right knee replacement 20 years ago and then a knee revision in the same leg last year. I continue to have pain in that knee. The left knee needs to be replaced as well. However, due to an accident. I have had many fractured bones and osteomyelitis in this knee. I have a lot of pain and took two steroid shots in this knee which gives some relief. I am very hesitant to have knee replacement as there is a high risk of losing the leg. My right shoulder (rotor cuff) gives me a lot of pain and I had two cortisone shots in that shoulder too. The cortisone shots do affect my blood sugar and I have to adjust my insulin to compensate for it. I do get around within the house and to the garage. And consider that I was in a wheelchair for two years after the knee revision. I cannot take Morphine, Codeine, or Percocet. I take tablet Tramadol 50 mg four to five times per day that helps me with the pain. I also take Gabapentin for nerve pain. Is there any risk associated with getting steroid shots for my left knee or my right shoulder? Kindly suggest.