A pain shot is an injection that delivers medication directly to the source of pain, whether that’s a joint, a muscle knot, or the space around a nerve. Unlike oral painkillers that travel through your entire bloodstream, pain shots concentrate relief exactly where you need it, which typically means faster results and fewer body-wide side effects. There are several types, and the one recommended for you depends on where your pain is and what’s causing it.
Common Types of Pain Shots
Pain shots fall into a few broad categories based on what’s being injected and where it goes. The most common include:
- Corticosteroid (steroid) injections: Delivered into joints or soft tissues to reduce inflammation from conditions like bursitis, tendinopathy, and osteoarthritis. These are one of the most frequently used pain shots in medicine.
- Nerve blocks: A local anesthetic is injected near a specific nerve to interrupt pain signals. These target the exact nerve root causing trouble, making them useful for conditions like sciatica from a herniated disc.
- Epidural injections: Medication is delivered into the epidural space surrounding the spinal cord, typically to treat back and leg pain from disc herniations or spinal stenosis. The approach is less precise than a nerve block but is considered easier and carries a lower risk of complications.
- Trigger point injections: A needle is inserted directly into a painful muscle knot (trigger point) to release tension and relieve myofascial pain. These can contain a local anesthetic, saline, or nothing at all.
- Hyaluronic acid injections: A gel-like substance is injected into the knee joint to supplement natural joint fluid in people with osteoarthritis. These work differently from steroid shots and are designed specifically for joint lubrication and cushioning.
How Steroid Shots Reduce Pain
Steroid shots are the workhorse of pain injections. They work by dialing down your body’s inflammatory response at the molecular level. When injected into an inflamed area, the steroid enters your cells and essentially switches off the genes responsible for producing inflammatory proteins. With less inflammation, there’s less swelling, less pressure on surrounding tissues, and less pain.
Relief doesn’t happen instantly. Most people notice improvement within a few days, though it can take up to a week or two for the full effect. Once working, a single steroid injection can provide relief lasting weeks to several months, depending on the condition and the location.
Trigger Point Injections for Muscle Pain
Trigger point injections take a different approach. They target tight, painful knots in muscles, most commonly in the neck, shoulders, and lower back. What’s surprising is that the substance injected may matter less than the needle itself. A review of 23 randomized trials found no meaningful difference in pain relief between injections using a local anesthetic, saline, or even dry needling (inserting a needle with nothing in it). All approaches produced significant pain reduction.
One study comparing trigger point injections to intravenous anti-inflammatory drugs in people with lower back muscle pain found the injections provided better pain relief at every time point measured up to 60 minutes. Adding a steroid to the injection, a common practice, hasn’t been reliably shown to improve results beyond what a simple anesthetic achieves on its own.
Hyaluronic Acid for Knee Osteoarthritis
Hyaluronic acid injections are specifically designed for osteoarthritis of the knee. The injected gel mimics the natural lubricating fluid your joint produces less of as cartilage wears down. In one multicenter study, 68% of patients experienced symptom relief within four weeks of treatment, and 55% of those patients maintained that relief for a full 12 months. Pain during activity, pain at rest, and walking ability all showed significant improvement compared to baseline.
These injections are typically given as a series of three to five shots over several weeks rather than a single injection.
What the Procedure Feels Like
Most pain shots follow a similar sequence. You’ll be positioned based on which body part is being treated, and the skin over the injection site will be cleaned and numbed with a small anesthetic injection. For deeper targets like spinal nerves or hip joints, imaging guidance is used to ensure the needle reaches exactly the right spot.
Fluoroscopy, a type of real-time X-ray, is the most common imaging tool. It allows the provider to watch the needle’s position on a screen and confirm placement by injecting a small amount of contrast dye. Ultrasound is another option, though fluoroscopy tends to be preferred for deeper joints, heavier patients, or areas with surgical hardware. The entire procedure typically takes 15 to 30 minutes.
You’ll feel pressure and possibly a brief sting when the needle enters. Some injections, particularly nerve blocks, may produce a brief sensation of tingling or warmth along the affected nerve. Joint injections can cause a temporary feeling of fullness or pressure in the joint.
Recovery and Getting Back to Activity
The first 24 hours after a pain shot should involve relative rest of the injected area. This isn’t just about comfort. For steroid injections, resting the joint helps the medication stay at the injection site and bind to the tissue rather than getting flushed into your bloodstream through movement.
After that initial day or two, a gradual return to activity is the standard approach. For lower-body injections, that means starting with low-impact exercises like cycling or bodyweight movements before progressing to full activity as symptoms allow. If the injection was in a body part you don’t use heavily in your normal activities, the timeline can be more flexible. There’s no strict protocol, but the general recommendation from sports medicine research is one to two days of rest followed by a progressive increase in activity.
Side Effects and Risks
Pain shots are generally low-risk, but steroid injections carry some specific considerations. The most common side effect is a temporary flare of pain at the injection site lasting a day or two. Some people experience mild facial flushing or a feeling of warmth.
For people with diabetes, steroid injections cause a temporary spike in blood sugar. Across 10 studies reviewed on this topic, every single one found significant blood sugar elevations after a local steroid injection. Peak levels occurred within one to five days and returned to baseline within 24 hours to 10 days. Individual readings climbed as high as 518 mg/dL, with average elevations ranging from 125 to 320 mg/dL above normal. People with type 1 diabetes or poorly controlled type 2 diabetes experienced higher spikes that lasted longer. No serious complications were reported in these studies, but the potential for problems exists, especially if blood sugar is already poorly controlled.
Steroid injections are not recommended when there’s an active infection at the injection site or when skin at the target area is broken down.
How Often You Can Get Them
There’s no universally agreed-upon limit for how many steroid injections you can receive. Guidelines from multiple pain medicine societies recommend a minimum interval of two to three weeks between injections, and up to three months depending on the situation. The injection series should stop once you’ve achieved acceptable pain relief or when the benefit plateaus.
Many providers follow a practical rule of limiting steroid injections to a given joint to three or four per year, though this isn’t a hard clinical cutoff. The concern with repeated steroid injections is potential tissue damage over time, including weakening of tendons and cartilage at the injection site.
When Injections Aren’t Enough
Pain shots are often a bridge, not a permanent solution. They’re most appropriate for acute pain, flare-ups of chronic conditions, or as a complement to physical therapy and other treatments. When a steroid injection provides good but temporary relief, it confirms the source of pain and can guide decisions about next steps.
For spinal facet joint pain and sacroiliac joint pain, radiofrequency ablation is one option when injections provide only short-lived relief. This procedure uses heat to disrupt the nerve fibers carrying pain signals, and research suggests it offers longer-lasting relief than steroid injections for these specific conditions. If you haven’t responded to an injection within about six weeks, that’s generally the point where alternative approaches are considered.