
Hello.
This is Kim Ha-won from Mapo Dermatology Clinic.
For those considering the Rejuran procedure,
the first question that comes to mind is:
Will it really work for my skin?
People around you may say it is good,
but on the other hand, there are also reviews saying the change is hard to notice.
So in this post, I will organize the principles of Rejuran treatment and
the reasons why its effects may feel subtle. Haha.
💧 Rejuran, Brief Summary

Rejuran is a skin booster treatment that directly injects
PN (Polynucleotide), extracted from salmon DNA,
into the dermal layer of the skin.
The PN ingredient helps damaged skin recover
and stimulates fibroblasts to promote collagen production.
In other words, it is not just an injection that moisturizes the surface,
but a method that improves the skin’s internal environment to gradually restore elasticity, wrinkles, skin texture, and hydration.
About 2 to 3 weeks after the procedure, you may notice smoother skin texture and reduced inner dryness,
and the full improvement effect appears over 1 to 3 months.
It is not an immediate change like Botox or a water glow injection,
but a treatment that naturally improves over time.
In addition, the PN ingredient strengthens the skin barrier, so it can also help people with sensitive skin or those who easily develop breakouts from external刺激.
⚠️ Why does the effect feel different for each person?

Even with the same Rejuran treatment,
some people find their skin becomes smoother,
while others hardly notice any difference.
The key is where,
and how it was injected.
Our skin is divided into the epidermis, dermis, and subcutaneous fat layer,
and Rejuran must be injected precisely into the dermis (about 1 to 2 mm) to be effective.
If the depth is not correct,
the PN ingredient may not do its job and may be absorbed,
so the effect can feel minimal.
🖐 Why precise injection is important
Rejuran treatment is not something that can be done simply
by just inserting a syringe.
🖐 Medical staff expertise
🖐 Hand angle and pressure
🖐 Skin thickness and area-specific characteristics
All of these factors must be precisely aligned
to ensure even injection into the dermal layer.

The embossed bumps (white raised marks) that appear immediately after the injection
are a sign that the product was injected correctly.
If there is no embossing or it is uneven,
the injection depth or amount may not have been consistent.
In other words, having embossing
is actually a sign that the procedure was performed accurately.
💡 Rejuran, Key Points
Although it looks like a simple injection procedure,
it actually requires delicate judgment and skill.
💡 PN ingredient concentration
💡 Injection depth and spacing
💡 Dosage by area
For example, thin areas such as under the eyes or around the mouth
can bruise or become bumpy if the depth is even slightly off,
while thicker areas such as the cheeks or forehead
may show reduced effectiveness if injected too superficially.
In the end, the difference in Rejuran results depends on
how accurately
and evenly it was injected.
💬 Rejuran Q&A
Q1. Can I wash my face right after the procedure?
Right after the procedure, injection marks may remain,
so please avoid washing your face and applying makeup for about 6 hours.
After that, you may gently wash with lukewarm water, and it is safer to avoid irritating scrubs or saunas for 3 to 5 days.
Q2. How many sessions are needed to feel the effect?
Generally, 3 to 4 sessions
at 3- to 4-week intervals are recommended.
Because the PN ingredient works slowly within the skin,
the effects become more stable with cumulative treatments.
Q3. How painful is it?
There are individual differences, but since it is performed after applying numbing cream,
most people can tolerate it!
Because of the viscosity of the injection solution, you may feel slight stinging or tightness,
but the procedure takes about 10 to 15 minutes, and there is almost no pain afterward.
Q4. How long does the effect last?
Even one treatment can improve skin texture,
and maintenance treatments are recommended once every 3 to 6 months.
The PN ingredient induces skin regeneration,
so ongoing care may help slow the aging process.
Q6. What are the precautions?
Please avoid alcohol, smoking, saunas,
and strenuous exercise for 2 to 3 days after the procedure.
Because the treated area may become dry,
it is recommended to apply moisturizer frequently.
✅ Final Summary
1️⃣ Strengthening the skin barrier + improving fine wrinkles with PN ingredient
2️⃣ Accurate injection into the dermal layer is the key
3️⃣ The careful sense and experience of the medical staff determine the result
Do not choose based on price alone,
and make sure to check the experience of the medical staff
and the precise treatment method.
Even when looking for a Mapo dermatology clinic,
choosing based on treatment experience and injection skill
can lead to a result you won’t regret.
Also, at a Mapo dermatology clinic,
if you refer to reviews from people who have received Rejuran,
you can understand the treatment process and effects more realistically,
and during the consultation, you can ask specific questions
about anything you are curious about.
If you are planning to visit a Mapo dermatology clinic,
it is a good idea to check detailed points such as embossing and injection depth
during the consultation.
By checking these points when choosing a Mapo dermatology clinic,
you can achieve more satisfying treatment results.
Thank you for reading.
This was Kim Ha-won from Mapo Dermatology Clinic.
