Cortisone is an anti-inflammatory medication, not a pain killer. However, by reducing inflammation, pain often subsides.
Systemic Side EffectsSystemic side effects occur as a result of a small amount of the cortisone entering the bloodstream and affecting your entire body, not just the location where the cortisone was given.
Systemic side effects of a local injection of cortisone are rare and usually minor. Unlike taking oral steroids, or having cortisone injected directly into the bloodstream, only a small amount of a local injection is absorbed by the body. And since the body actually produces cortisone naturally, most people do not experience systemic effects. Those who do may experience:
The most common systemic reaction is seen in diabetic patients. Patients with diabetes should carefully monitor their blood sugar as cortisone can cause a temporary rise in their levels. Patients taking insulin should be especially careful, checking their blood sugar often and adjusting the insulin doses, if necessary.
Patients may experience flushing sensation and redness of their face. This reaction is more common in women and is seen into up to 15 percent of patients. This can begin within a few hours of the injection and may last for a few days.
Local Side EffectsLocal side effects are those that are only experienced in one area of the body. The local side effects of a cortisone injection are also rare.
Some patients have discomfort after the injection and may experience an increase in pain 24 to 48 hours after being treated. This usually subsides quickly and can be aided with an ice pack and anti-inflammatory medication.
Whenever there is a break in the skin, like when a needle is used to administer cortisone, there is a chance of infection. Your doctor will sterilize the skin to minimize the risk of infection.
Patients with darker skin should also be aware that cortisone may cause skin around the injection site to lighten. This is not harmful.
High doses of cortisone can have detrimental effects on some tissues in the body. When injected into fatty tissue, cortisone can lead to a problem called fat atrophy. Fat atrophy causes loss of fatty tissue, which can lead to dimpling of the skin or the thinning out of fat. Patients who get cortisone injections in the heel to treat plantar fasciitis may find walking painful as fat that usually cushions their steps may thin out.
Cortisone can also cause weakening of tendons. This is one reason your doctor may limit the number of cortisone injections administered. Cortisone can also lead to tendon rupture, as is the case when cortisone is injected for Achilles tendonitis.
Are Cortisone Injections Safe?Cortisone injections are extremely safe, but they do still carry potential problems. If you are concerned about having a cortisone shot, talk with your doctor. While cortisone is a powerful treatment for many orthopedic conditions, there are usually other options that can also be tried.
Cole BJ and Schumacher HR "Injectable Corticosteroids in Modern Practice" J. Am. Acad. Ortho. Surg., January/February 2005; 13: 37 - 46.
Fadale PD and Wiggins ME "Corticosteroid Injections: Their Use and Abuse" J. Am. Acad. Ortho. Surg., May 1994; 2: 133 - 140.