Yes, cortisone injections can occasionally cause mild bruising at the injection site.
This is usually temporary, harmless, and settles within a few days. Bruising is more common in patients who:
- Take blood thinners
- Have delicate or thin skin
- Are prone to easy bruising
Ultrasound-guided injections reduce the risk by improving accuracy and avoiding unnecessary tissue trauma.
Why Does Bruising Happen After a Cortisone Injection?
Bruising occurs when a small blood vessel under the skin is disturbed during the injection. This can cause a small amount of blood to leak into surrounding tissue, resulting in a visible bruise.
It is important to understand that:
- The steroid itself does not directly cause bruising
- The injection process can occasionally irritate small surface vessels
- Bruising is usually mild and temporary
At Alton Pain Clinic, we use ultrasound-guided cortisone injections, which allow us to visualise structures in real time and avoid blood vessels wherever possible.
How Common Is Bruising After a Cortisone Shot?
Bruising is considered an uncommon and minor side effect.
Most patients experience:
- No bruising at all
- Mild tenderness for 24–48 hours
- Occasionally a small purple mark that fades within 5–7 days
Significant bruising is rare.
Does Ultrasound Guidance Reduce Bruising?
Yes.
An ultrasound-guided cortisone injection helps:
- Identify and avoid blood vessels
- Ensure accurate needle placement
- Reduce repeated needle passes
- Improve overall safety
This makes bruising less likely compared to blind (non-guided) injections.
When Should You Be Concerned?
You should seek medical advice if you notice:
- Rapid swelling
- Severe pain
- Signs of infection (redness, warmth, fever)
- A large expanding bruise
These are uncommon but should always be assessed promptly.
Why Choose Alton Pain Clinic?
At Alton Pain Clinic, we specialise in:
- Ultrasound-guided cortisone injections
- Shoulder injections
- Joint and tendon pain treatment
- Image-guided musculoskeletal procedures
- Non-surgical pain management
Using ultrasound guidance improves accuracy, effectiveness, and patient safety.
Why Choose Ultrasound-Guided Injections?
Research shows blind (non-guided) injections are less accurate.
At Alton Pain Clinic, we specialise in:
- Ultrasound-guided shoulder injections
- Targeted subacromial bursa injections
- Precise cortisone placement
- Minimally invasive pain management
This approach improves safety, accuracy, and clinical effectiveness.
Key Takeaway
Cortisone injections can occasionally cause mild bruising, but it is uncommon, temporary, and harmless.
Bruising happens due to minor irritation of small blood vessels during the injection — not because of the steroid itself. Choosing an ultrasound-guided cortisone injection, like those offered at Alton Pain Clinic, significantly reduces the risk by ensuring precise and safe needle placement.
Frequently Asked Questions
Is bruising normal after a cortisone injection?
Mild bruising can occur and usually resolves within a few days
How long does bruising last?
Typically 3–7 days.
Can blood thinners increase bruising risk?
Yes, patients on anticoagulants may bruise more easily.
Is bruising dangerous?
No, small bruises are harmless and temporary.
Can ultrasound guidance prevent bruising?
It significantly reduces the risk by avoiding blood vessels.