The gave me a cortsone shot and then i had sacatic nerve pain. i went back and he put me on prednisone 5mg for 12 days. my knee hurts and it hard to bend my knee?

Need more informati: What was the location of the cortisone shot? When did the knee begin ot hurt? Is it swollen? which knee? Same? You have a combination of issues that need clarification. Uncertain whether the sciatic pain is independent of the cortisone shot and related to a more generalized joint pain syndome. Woud be best to see your physicians and have you get a consultation with the rheumatologist