Corticosteroid Injections (Steroid Shot): Overview and Use

Corticosteroid shots (often called cortisone injections or steroid shots) are powerful anti-inflammatory injections given by healthcare professionals directly into a specific area of the body. They typically contain a synthetic steroid (such as triamcinolone, methylprednisolone, or hydrocortisone) and often a local anesthetic (like lidocaine) for immediate numbing. Because the steroid is injected into the problem site, it works locally to reduce inflammation and pain, with fewer whole-body effects than oral steroids. For example, the Mayo Clinic notes that cortisone shots “can help relieve pain, swelling and irritation in a specific area” (especially joints such as the ankle, elbow, hip, knee, shoulder, spine or wrist). The injection delivers a high dose of medication right where it’s needed.

Indications (When Steroid Shots Are Used)

Steroid injections are most often used for localized inflammatory conditions. Common reasons a provider might give a steroid shot include:

• Arthritis: Injections into painful joints (knee, shoulder, hip, spine) for rheumatoid arthritis, osteoarthritis, gout, psoriatic arthritis, etc. – these shots reduce joint inflammation and pain.
• Bursitis and Tendonitis: Injections into inflamed bursae or tendon sheaths (e.g. “tennis elbow,” Achilles tendonitis, rotator cuff bursitis, plantar fasciitis) to ease swelling and pain.
• Soft-Tissue Pain: Trigger-point injections for muscle knots or localized fibromyalgia points; injections into finger/thumb (“trigger finger”) or carpal tunnel zones.
• Spinal Conditions: Epidural steroid injections are given near the spine (for herniated discs, spinal stenosis or sciatica) to calm nerve-root inflammation.
• Acute Flares: Short-term relief of severe inflammation (for example, a gout flare or a lupus flare in one joint or tissue).

Cortisone shots treat the symptoms (pain/swelling) in a specific area but do not cure the underlying disease. They are often used when other treatments (NSAIDs, physical therapy, etc.) have not fully relieved symptoms. The goal is to reduce inflammation and pain, improving mobility and function in the affected area.

Administration (How the Injection Is Given)

By healthcare providers only: Steroid injections must be given by a qualified clinician (general practitioner, rheumatologist, orthopedic surgeon, pain specialist, radiologist, trained nurse/physiotherapist, etc.). They cannot be self-administered. The procedure is done in a medical setting (office or clinic) under sterile conditions to prevent infection. Sterile gloves, antiseptic skin-cleaning (e.g. iodine or alcohol swab), and sterile needles/syringes are used.

Patient preparation: Before the shot, inform your provider about any infections (even a cold or fever), allergies (especially to steroids or lidocaine), or medications (e.g. blood thinners like warfarin or supplements that thin blood). You may be asked not to drive for a short time if a sedating anesthetic is used. Diabetics should check their blood sugar closely for a day or two after, as the steroid can raise glucose.

Injection procedure: The provider will position you so the affected area is accessible. They often first inject a small amount of local anesthetic (e.g. 1–2 mL lidocaine) to numb the skin and tissues – this makes the shot more comfortable. Next, using a (typically larger-gauge) needle, they insert it into the target site (joint space, tendon sheath or muscle). Many practitioners use imaging guidance (ultrasound, fluoroscopy/X-ray) to place the needle precisely.

Once the needle is in place, the clinician will aspirate (pull back on the plunger) to make sure no blood appears, confirming the needle is not in a blood vessel. If blood is seen, the needle is repositioned. Then they inject the steroid solution, usually in small increments. Some inject a mixture (e.g. steroid plus lidocaine together); others do two sticks (one for anesthetic, one for steroid). The full dose is slowly injected. Finally, the needle is withdrawn and a small dressing is applied. Pressure or ice may be used briefly to minimize bleeding and swelling.

Medications used: Common injectable steroids include Triescence/methylprednisolone acetate, Kenalog (triamcinolone acetonide), Celestone (betamethasone), etc. The exact drug and concentration are chosen by the provider. Often 20–40 mg (0.5–1 mL) of the steroid suspension is given for a joint or tendon sheath, but this varies by drug and site. (For large joints like a shoulder or hip, doses up to 40–80 mg are not unusual.) Sometimes a mix of short-acting and long-acting steroids is used for both immediate and prolonged effect. The provider administers the smallest dose needed; repetitive high doses are avoided to reduce side effects.

Aftercare (Post-Injection Care)

After the shot, you will usually wear a small bandage or patch. You should rest the treated area for about 1–2 days and avoid heavy or strenuous use for several days. For example, if your knee was injected, take it easy walking and avoid sports; if an elbow was injected, avoid lifting or stress on that arm. Ice packs applied intermittently can help reduce swelling at the site. You may begin gentle activity as tolerated after 1–2 days.

It’s common to experience a “cortisone flare” – a brief increase in pain and discomfort – in the injected area within the first 24–48 hours. This is due to local irritation and usually resolves on its own in a couple of days. Taking over-the-counter pain relief (acetaminophen or NSAIDs, as advised by the doctor) and icing can ease this transient flare. After this initial period, the steroid begins to work: it often takes a few days up to a week before you notice the full benefit as inflammation subsides.

Most people feel gradual improvement over 1–2 weeks, and the effect can last for weeks to months (often several months) depending on the condition. During this time, you can typically return to normal activities and therapy (e.g. physical therapy exercises) as advised by your doctor. If the injection was given for back/nerve pain, your doctor will tell you how to safely mobilize.

Dosage and Repetition

Each steroid shot is a one-time dose at that visit. A single injection contains a fixed dose of steroid medication (specified by the preparation, e.g. 40 mg in 1 mL). The provider calculates the dose needed, which does not depend on patient weight but on the site and drug. For most adults, the dose of steroid suspension used in one injection is far below the maximum systemic dose.

Steroid injections can be repeated if needed, but only after an adequate interval. Generally, patients must wait several weeks to months before another injection in the same area. Most doctors use a rule of thumb: no more than about 3 injections in the same joint or area per year, with at least 3–4 months between shots. This spacing allows the steroid’s effects to wear off and reduces the risk of tissue damage. (In fact, UK guidelines suggest resting an injected joint 1–2 days and avoiding >3 injections per year in the same part.) If multiple joints or sites are inflamed, different joints can be injected on different visits. The frequency and total number of injections depend on the condition, patient age, and how well each injection worked. For example, a steroid shot for severe gout in one joint might be repeated if arthritis flares again, whereas a shot for thumb tendonitis might only be repeated once.

Note: This advice on frequency applies to local “shot” injections. (Separately, some systemic steroid needs – e.g. an IM steroid for adrenal insufficiency – follow different dosing schedules determined by doctors.)

Side Effects and Precautions

When used appropriately, a single corticosteroid shot is generally safe, but there are important cautions. Because steroids are potent, side effects increase with higher doses and repeated injections. Key points:

• Local reactions: Some soreness, bruising or bleeding at the injection site is common. The skin around the site may temporarily lighten (loss of pigment) or dimpling/thinning may occur if many injections are given there over time. Rarely, a steroid injection can cause a skin infection (signs: redness, warmth, fever) – if the joint becomes hot, swollen or the patient feels unwell after an injection, seek medical attention.

• Pain flare: As noted, an injection often causes a short-lived increase in pain (“cortisone crash” or flare) for 24–48 hours. This usually passes, but it’s a known effect. Use ice and pain relievers as needed.

• Tissue damage with frequent shots: Repeated steroid injections in one spot can weaken tendons and ligaments, and possibly damage cartilage or bone in the joint. Therefore, providers limit injections in any joint to avoid weakening it. Evidence is mixed about long-term cartilage damage, but precautions are taken (hence the limit of ~3/year per site).

• Systemic effects (rare, usually with high doses): A single local injection causes minimal body-wide steroid levels. However, possible systemic side effects (especially if large doses or frequent shots) include mild hyperglycemia (blood sugar rise), increased blood pressure, fluid retention, and (very rarely) adrenal suppression. For instance, patients with diabetes may notice higher glucose readings for a day or two after the shot. Providers often warn diabetics to check their sugars closely for a few days post-injection. Transient facial flushing and insomnia may occur in the day after the shot.

• Allergic reactions: True allergy to corticosteroids is extremely rare. However, some people are sensitive to preservatives or components in the injection. Any known history of steroid allergy or anaphylaxis should be reported to the doctor before injection.

• Precautions: Do not give a steroid injection if there is an active infection in or near the injection site or anywhere else in the body. The drug can suppress immune response and make infections worse. Also, if you are taking blood thinners, let the provider know: minor bleeding or bruising is possible, and sometimes blood thinners are held briefly to reduce this risk. Inform your provider if you have conditions like glaucoma, diabetes, high blood pressure or osteoporosis, as these might influence injection decisions.

• After a flu/covid vaccine: Some guidelines recommend spacing steroid injections for a week or more after vaccinations, since steroids can influence immune response. Mention any recent vaccines to your provider.

In all cases, steroid injections should be part of an overall treatment plan. Providers usually combine injections with other therapies (medications, physical therapy, lifestyle measures). Patients should not use the treated area heavily immediately after injection and should follow any rehab or exercise advice given.

Summary

Corticosteroid (cortisone) injections are a common, effective way to reduce local inflammation and pain. A clinician injects a steroid solution (often with numbing medication) into a joint, tendon sheath, bursa, or muscle to calm the immune response there. These shots are used for arthritic joints, tendonitis, bursitis, nerve impingements, and other localized inflammatory conditions. Because they are potent, they must be administered by a trained medical professional using sterile technique. After the shot, the area may feel achy for a day or two, but benefit usually appears over the next week or so. Injections can be repeated if necessary, but only a few times per year to avoid tissue damage. Common side effects include temporary local pain, mild skin changes, and a short-lived rise in blood sugar; serious complications are rare if precautions are followed.

Always follow your provider’s specific instructions. If you have questions about an upcoming steroid injection (what to expect during and after) or whether it’s appropriate for your condition, discuss them with your doctor or nurse. Emergency signs (increasing pain/redness, fever, difficulty breathing, etc.) after an injection should prompt immediate medical attention.