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.
This is due to the cortisone crystallizing. The cortisone flare usually only lasts a day or two after the shot is administered and can be treated by icing the area of the shot. It is also common for the area around the shot to whiten in appearance. More serious side effects are rare, but do occasionally occur.