What Is an Intramuscular Cortisone Shot?
An intramuscular cortisone shot is a type of corticosteroid therapy used to calm inflammation at a systemic level. Rather than targeting one joint or localized region, this injection is placed into a large muscle—usually the deltoid of the upper arm—so that the medication can be absorbed into the bloodstream and reduce inflammation body-wide. It’s a go-to treatment for dermatologic issues that affect multiple areas of skin and can’t be easily managed with topical creams alone, especially when symptoms like itching, redness, or rash are persistent and widespread.
Common Skin Conditions Treated
We typically recommend intramuscular cortisone shots for:
- Moderate to severe eczema
- Allergic contact dermatitis
- Widespread itching (pruritus)
- Inflammatory skin reactions not confined to one area
- Atopic or autoimmune skin conditions (in some cases)
Benefits of Intramuscular Cortisone Shots
If your inflammatory skin condition isn’t responding to topical treatments, or if you need relief that covers your whole body, this form of cortisone therapy may be your answer. Benefits include:
- Quick Relief Onset
Many people feel relief from symptoms within 1–2 days of treatment. - Sustained Results
Effects can last for weeks to months, offering long-term management with a single injection. - Minimally Invasive
The procedure is fast and straightforward, with no downtime or recovery period required. - Bypasses the Gut
Great for those who can’t tolerate or don’t want to rely on oral steroids. - Treats the Whole Body
Since it circulates through your bloodstream, it works for widespread conditions, not just localized issues. - Safe & Well-Tolerated
When spaced out properly and administered by a board-certified provider, intramuscular cortisone is a safe, time-tested treatment.
How It Works
Receiving an intramuscular cortisone shot is a simple and efficient in-office procedure. Here’s what to expect:
1. In-Clinic Injection
The area around your upper arm is cleaned, and the cortisone medication is injected into the deltoid muscle with a fine needle. The whole process takes just a few minutes.
2. Absorption & Circulation
Once administered, the steroid slowly absorbs into the bloodstream. From there, it travels throughout the body, helping to regulate overactive immune responses and reduce inflammation in the skin and beyond.
3. Relief of Symptoms
Most patients begin to experience relief from symptoms like itchiness, swelling, and discomfort within 24 to 48 hours after treatment.
4. Lasting Results
While results vary, the effects of a single shot may last for several weeks up to a few months, depending on the severity of the condition and your body’s response.
5. Ongoing Support
Your provider may recommend follow-up visits to monitor progress and adjust your treatment plan as needed. We’ll also talk about complementary options like skincare, prescription creams, or lifestyle adjustments to maintain your results.
Aftercare and What to Expect
Most people go right back to work or daily life after receiving their injection. Here’s what else you might notice:
- Slight soreness or swelling at the injection site (usually fades in a day or two)
- Improved skin symptoms—less redness, less itch, and better comfort
- Longer periods between flare-ups, especially when combined with other treatments
We’ll give you personalized aftercare guidance and can recommend topical support or trigger-avoidance strategies to help maintain your results.
FAQs
Does the injection hurt?
The shot feels similar to a vaccine—most patients describe it as a quick pinch. We can use a numbing spray if needed.
How soon will I feel better?
Improvements usually begin within 24 to 48 hours, with full relief taking a few days in some cases.
How long does it last?
Results typically last anywhere from several weeks to a few months, depending on your skin condition and overall response.
Are there side effects?
Side effects are uncommon but may include:
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Mild pain or redness at the injection site
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Temporary flushing or mood changes
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Rarely, sleep disruption or elevated blood sugar in those with diabetes
We’ll go over everything you need to know before administering treatment.
Can I combine this with other treatments?
Yes! Cortisone shots often work best when used alongside other treatments, such as prescription creams, light therapy, or skin barrier repair routines.
Is this the same as a cortisone shot for joints?
Not quite. While both use corticosteroids, joint injections treat a specific area, like the knee or shoulder. Intramuscular cortisone, on the other hand, is designed for full-body relief—ideal for dermatologic concerns that are more generalized.
Who should not receive this treatment?
Intramuscular cortisone may not be appropriate for people with uncontrolled diabetes, active infections, or certain other health concerns. We’ll review your medical history to ensure it’s safe for you.
Hear from
Real Patients
Personalized Skin Relief in Pasadena
You don’t have to live with the discomfort of widespread skin inflammation. Whether you’re managing eczema, persistent itch, or chronic dermatitis, our intramuscular cortisone shots offer a reliable way to feel like yourself again, without daily pills or complicated regimens. At Metropolis Dermatology in Pasadena, CA, we combine expert care with a patient-centered approach, tailoring your treatment to what works best for you and your skin.
Schedule your consultation today and take the next step toward long-lasting skin relief.