Rejuran Bruising and Bumps: What's Normal?

If you've noticed a bruise or a small firm bump under your skin a few days after Rejuran, you're not alone — and it doesn't automatically mean something went wrong.

Rejuran works differently than fillers or Botox, so it also reacts differently under the skin. In this article, we'll cover why bruising and nodules happen, how long they usually take to resolve, and the signs that mean it's time to check in with your provider.

What Is Rejuran, and Why Does It React Differently Than Fillers or Botox?

Rejuran is built around PN (polynucleotide), an ingredient derived from salmon DNA that's injected directly into the mid-dermis. Unlike a filler, which adds volume to smooth a specific area, PN is designed to encourage your skin's own tissue to repair and regenerate.

That difference in purpose changes how your skin responds. A filler tends to show its effect right away. Rejuran doesn't — instead, you may notice needle marks, mild bruising, or swelling in the days right after treatment, before your skin has had time to settle.

Why Do Bruising and Nodules Happen After Rejuran?

The short answer? It usually comes down to how deep the needle goes, not your skin type or how "sensitive" you are.

PN needs to land in the mid-dermis — roughly 1.5 to 2 millimeters below the surface — to do its job well. Go too shallow, and the product tends to pool near the surface as a small, firm bump. Go too deep, and the needle is more likely to nick a tiny blood vessel, which shows up as a bruise.

In a review of a month's worth of consultations at our clinic, about 1 in 7 patients had noticeable bruising, and roughly 1 in 15 had a nodule that lingered for more than a week. Those numbers vary quite a bit from provider to provider, largely because injection technique isn't standardized across clinics.

We've seen this play out with patients who'd had Rejuran elsewhere. One patient in her late thirties came in frustrated that a row of small, grain-like bumps along her cheek hadn't gone away a full month after her third session at another clinic. On exam, the bumps followed the exact line of the injection pattern — a sign the product had been placed too shallow, session after session, instead of settling into the dermis where it belongs.

• Full face: A fine needle at a consistent depth works well for most areas.
• Thin skin: Around the eyes and mouth, a cannula is often gentler and lowers the odds of bruising.
• History of nodules: Splitting the dose across two sessions about two weeks apart can lower the risk of a repeat.

Rejuran Recovery Timeline: What to Expect Day by Day

Most side effects follow a fairly predictable pattern.

• Day 0–1: Tiny needle marks and mild redness are expected. Makeup can usually cover them.
• Day 2–3: Bruising, if it happens, is typically most visible around now.
• Day 3–5: Bruising and swelling usually fade for most people.
• Week 2–3: Any small nodules typically soften and flatten with warm compresses and gentle massage.

If a bruise is more significant, it can take closer to a week to clear completely. If you have an event coming up, it's worth scheduling your session at least five days ahead — earlier if you tend to bruise easily.

Who's More Likely to Bruise or Develop Nodules?

Anyone can bruise after Rejuran, but a few factors make it more likely.

• Thin under-eye or lip-line skin, where blood vessels sit closer to the surface
• Blood thinners, certain supplements like fish oil or vitamin E, or a recent alcohol-heavy week
• A history of nodules from a previous session, regardless of where it was done
• Multiple passes over the same area in a single visit

None of this means you shouldn't get Rejuran — it just means your provider should adjust technique, like needle versus cannula or splitting the dose, based on your history instead of treating every patient the same way.

Side Effects & Risks: When You Should Call Your Provider

Mild bruising and short-lived bumps are a normal part of recovery. A handful of signs, though, mean it's time to reach out.

• A nodule past the one-month mark: Most soften with warm compresses within two to three weeks. If one is still firm after a month, it may need a saline dilution injection or a micro-dose of steroid at the clinic — not something to keep massaging on your own.
• Redness, warmth, or pain that's getting worse instead of better: This isn't typical bruising or swelling and should be checked promptly.
• A nodule left untreated for months: Left alone too long, it can harden into a fibrotic bump that's harder to resolve.

If you notice spreading redness, fever, or pain that's getting worse rather than better, seek medical care right away.

One thing worth knowing: because Rejuran isn't a hyaluronic acid filler, hyaluronidase — the enzyme used to dissolve HA fillers — doesn't work on it. A lingering nodule needs a different approach, which is exactly why it's worth going back to the clinic that treated you rather than guessing at home.

How Much Does Rejuran Cost?

Pricing for Rejuran varies by clinic, by formula, such as Rejuran Healer versus Rejuran HB, and by how many sessions your provider recommends. Most treatment plans are built around a series of three sessions spaced three to four weeks apart, rather than a single visit.

Because PN works by encouraging gradual tissue repair, a single session is rarely enough to judge whether it's working. We've seen plenty of patients who tried one or two sessions elsewhere, felt like nothing happened, and then noticed a real difference in texture after finishing a full series.

If you want current session pricing, a consultation is the best way to get a number specific to your skin and goals — see current offers at /en/promotion.

The Bottom Line

Bruising and small, short-lived bumps after Rejuran are common, and in most cases they're a sign of normal healing rather than a mistake. Nodules that linger past a month, or bruising and swelling that keep getting worse instead of better, are the exception, not the rule.

• Bruising and needle marks typically fade within three to five days.
• Small nodules usually soften within two to three weeks with warm compresses.
• Needle versus cannula, and dosing strategy, matter more than "skin type" for who bruises.
• A nodule that's still firm after a month calls for a clinic visit, not more time.

Like any injectable, Rejuran comes with trade-offs, and results tend to build gradually rather than all at once. Ultimately, the right technique for your skin depends on a conversation with your provider. If you're considering Rejuran, a consultation is the best way to find out what fits you. BeautyStone is a dermatology clinic in Seoul's Hapjeong area — see current offers at /en/promotion.

Frequently Asked Questions

Q1. Is bruising after Rejuran normal?

Yes, in most cases. Rejuran is injected into the mid-dermis, and even a well-placed needle can nick a tiny blood vessel. Mild bruising usually fades within three to five days. Bruising that keeps spreading or getting worse is the exception and is worth a call to your provider.

Q2. How long do Rejuran bumps or nodules last?

Most small nodules soften within two to three weeks with warm compresses and gentle massage. If a bump is still firm after a month, it likely needs an in-clinic fix, like a saline dilution or a micro-dose of steroid, rather than more time at home.

Q3. Can I go back to work the day after Rejuran?

Usually, yes. Needle marks and mild redness can be visible for a day or two but are typically easy to cover with makeup. If bruising does show up, it can take closer to a week to fully clear, so it's worth scheduling five or more days ahead of anything important.

Q4. How many Rejuran sessions do I need to see results?

Most providers build a plan around three sessions, spaced three to four weeks apart, since PN works by encouraging gradual tissue repair rather than an instant fix. Patients who felt like one or two sessions "did nothing" often notice a real texture change after completing the full series.