TL;DR
After a cortisone shot, expect brief numbness from the local anesthetic, a possible pain flare over the next day or two, then gradually increasing relief from the steroid over the following days to weeks.
- Local anesthetic gives temporary relief that wears off within hours.
- A “cortisone flare,” a brief increase in pain, is common in the first day or two.
- The steroid’s anti-inflammatory effect typically builds over several days.
- Call promptly for increasing redness, warmth, swelling, or fever, which can signal infection.
Getting a cortisone shot and not knowing what to expect afterward can be more stressful than the injection itself. Here is a realistic timeline of what typically happens, so you know what is normal and what is not.
What happens right after the injection?
Most cortisone injections include a local anesthetic along with the steroid medication. This means you may notice significant, sometimes complete, relief in the treated area within minutes, but this initial relief is temporary and comes from the anesthetic, not the cortisone itself. As the anesthetic wears off over the next few hours, your original pain may return, sometimes temporarily feeling similar to or slightly worse than before the injection.
What is a cortisone flare, and is it normal?
Yes, this is a recognized and common occurrence. Some patients experience a “cortisone flare,” a temporary increase in pain and inflammation at the injection site, typically within the first 24 to 48 hours after the shot. This happens as the steroid crystals settle into the tissue and is generally mild to moderate, resolving on its own within a day or two. Applying ice and taking an over-the-counter pain reliever, if appropriate for you, can help manage this period. It does not mean the injection failed or that something went wrong.
When does the actual relief from the cortisone kick in?
The steroid’s anti-inflammatory effect typically builds gradually, often becoming noticeable within a few days and continuing to improve over the following one to two weeks. Full benefit is generally expected within about four weeks, though this varies by the specific joint or tissue treated, your individual response, and the underlying condition being treated. Your provider will let you know what timeline is realistic for your specific situation.
What activity restrictions apply after a cortisone shot?
Your provider will typically recommend resting or limiting strenuous use of the treated area for a day or two after the injection, since overusing the area during the initial inflammatory flare can reduce the benefit of the treatment. Beyond that initial period, most patients can gradually return to normal activity as tolerated, guided by your specific treatment plan and how you are feeling. What a guided injection appointment actually involves is described in what to expect from an ultrasound-guided injection.
Does the recovery timeline differ by injection site?
Yes, to some degree. Injections into a larger joint, like the knee or shoulder, may carry a somewhat different flare risk and activity guidance than an injection into a smaller joint or tendon. Spinal injections, like an epidural, also come with their own specific aftercare instructions distinct from a joint injection. Your provider will give you site-specific guidance rather than a generic instruction sheet, since what is appropriate to do the day after an injection varies by exactly where the medication was placed.
What if my pain doesn’t improve at all after a few weeks?
If you have followed the expected timeline and are not seeing meaningful improvement, that is worth discussing with your provider rather than assuming the injection simply did not work as a final answer. Sometimes this means reassessing the original diagnosis, since a lack of response can be a diagnostic clue in itself. Other times it means discussing whether a second injection, a different treatment approach, or additional imaging makes sense. Either way, a lack of response is information your provider needs, not just a disappointing outcome to accept.
What symptoms need a call to your provider?
Contact your provider promptly for increasing redness, warmth, swelling, or drainage at the injection site, fever, or pain that is significantly worse than a typical flare and is not improving after a couple of days. These can be signs of infection, which, while uncommon, needs to be evaluated promptly rather than waited out. If you have diabetes, monitor your blood sugar closely for a few days after the injection, since cortisone can temporarily raise blood sugar levels.
Frequently asked questions
Is it normal for the pain to come back after the injection wears off?
Yes, this is expected. The initial numbness is from the local anesthetic, which wears off before the steroid’s longer-lasting effect takes hold.
How long does a cortisone flare typically last?
Usually one to two days. If it persists longer or is accompanied by increasing redness, warmth, or fever, contact your provider.
Can I ice the area after my injection?
Generally, yes, icing can help manage discomfort during a flare. Ask your provider for specific aftercare instructions for your situation.
Will cortisone affect my blood sugar if I have diabetes?
It can, temporarily. Monitor your blood sugar more closely for a few days after the injection and let your provider know about your diabetes before treatment.
What if I don’t feel any relief at all after a few weeks?
If you are not seeing the expected improvement, contact your provider. They may reassess your diagnosis or discuss other treatment options.
Take the next step
Knowing what to expect makes the recovery period much less stressful. Questions about a cortisone shot you are considering or recently had are worth putting to the provider who gave it or ordered it.
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Sources: AAOS OrthoInfo, cortisone shot patient guidance. Mayo Clinic, cortisone shots overview.
