Heart problems. 1  Cardiomyopathy (problem with the heart muscle) 2  Heart arrhythmias (rhythm problems) 3  Heart failure. 4  Pericarditis (swelling of the membrane surrounding the heart)
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.
Some of the side effects that have been reported with steroid injections include the following: Cortisone flares can occur which involve pain that can be worse after the injection than before the shot. This usually improves within 12 to 48 hours.he injection might cause the fatty tissue around the injection site to look sunken, but this side effect is only temporary. Because of the risk of complications, and the side effects of cortisone, there is usually a limit to the number of cortisone shots that can be administered safely.