To describe the natural history of a condition or disease. To describe the natural history of a condition or disease. To determine effectiveness or cost effectiveness of treatments/services and/or health care products. To measure or monitor safety and harm. To measure quality of care.
According to the NMSS, attacks or flare-ups of symptoms only qualify as exacerbations if: 1  they occur at least 30 days from an earlier flare-up. 2  symptoms last for 24 hours or longer.
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.