what is a steroid flare up
Cortisone Flare. A cortisone flare is one of the many side effects of a cortisone injection, which causes pain and inflammation in the area where the injection has been administered.Advertisement. Cortisone or a corticosteroids are a type of medication that is used to treat inflammation of the joints.ince it is a very strong medicine, it results in certain side effects, a very prominent one being a cortisone flare. A cortisone injection is administered directly at the location of the pain and inflammation.