Nonhyeon Station Dermatology: How Rejuran Affects Skin Texture and Firmness

Cover image: a woman with short hair poses softly. Text: “Rejuran – why your skin condition changes.”

When your skin looks drier and rougher than before and fine lines start to show, skincare products alone may not feel like enough. That's when many people come to Nonhyeon Station Dermatology to ask what changes Rejuran can realistically bring and how it differs from similar regenerative injections.

It's easier to understand Rejuran as a method that delivers PN ingredients into the skin to help restore skin condition, rather than a simple injection that just adds moisture.

Today, I'll go through the questions people ask most often, in order: effects, differences in ingredients, pain and procedure methods, and treatment intervals and recovery.

What changes can you expect in your skin with Rejuran?

PN and PDRN-based injections are used to support the skin's natural recovery process. They are involved in collagen and elastin production, so results can include improved skin texture, firmness, and fine lines. People with dry or rough skin sometimes notice less of a tight, pulling feeling. Some also report improvements in redness or pores, but results vary widely depending on the cause and the condition of the skin. When looking into skin boosters, don't decide based on a single effect. First, identify the skin concern you most want to improve.

Are PDRN and PN the same ingredient?

Because the names sound similar, they can be confusing at first. PDRN is generally described as a relatively small DNA fragment that supports regeneration, while PN is often described as having a larger molecular structure.

The procedure often called the "salmon injection" in dermatology clinics may use the PDRN type, while Rejuran uses PN as its main ingredient. Both types are used to support skin regeneration, but because each product differs in particle size, viscosity, and formulation, the feel of the product and the way it is administered can also differ.

Are there other products similar to Rejuran?

Besides Rejuran, there are several pure PN-based products with adjusted particle size and viscosity.

Patients worried about pain sometimes ask about products like Rejuran HB, which combine PN with hyaluronic acid and lidocaine. However, products can differ in PN concentration, viscosity, and added ingredients. Rather than choosing based only on whether a product seems less painful, it's best to consider your skin condition and the results you want together.

What determines the cost?

Cost can vary depending on the product used, the amount, and the treatment area. Treating part of the face and treating the entire face require different amounts of product. Clinic packages and promotions can also make a difference. So rather than comparing prices alone, confirm which product will be used, on which areas, and in what amount.

What's the difference between hand injection and machine injection?

Many people come in after searching online for Rejuran pain. There is the sting of the needle going in, but some people feel more pressure and discomfort when a thick, viscous solution is injected into the skin. In hand injection, the clinician adjusts depth and amount by area and injects directly. Machine injection uses multiple fine needles to deliver the solution in evenly spaced amounts. Machine injection may help ease discomfort, but some of the product can leak to the skin's surface during the procedure and be lost. Rather than deciding one method is always better, choose based on your pain sensitivity, skin thickness, and the treatment area.

How many sessions will it take to see results?

Rather than a single session, a common approach is a series of treatments at regular intervals in the early stage. For skin that is very dry or damaged, the number of sessions and the intervals may be adjusted.

Maintenance treatments may also vary depending on your current skin condition and how your skin responded to previous treatments. Rather than applying a fixed Rejuran schedule to everyone, adjust the interval based on your skin condition, the results you want, and your response to earlier sessions.

Does a lot of embossing mean better results?

Right after treatment, raised bumps (embossing) may appear on the skin. This is a common reaction as the solution is injected. In most cases it subsides over time. It may be more noticeable on dry, thin skin and less visible on thicker, firmer skin. So you can't conclude that bigger or longer-lasting embossing means better results.

How long should you rest after treatment?

Most people can return to their daily routines right away, but needle marks, swelling, or bruising may remain. Bruises often fade within a few days, though it may take longer for some people.

You can start cleansing and applying makeup according to the instructions from the clinic where you were treated. It's best to avoid saunas, hot compresses, intense exercise, and alcohol for a certain period. If you have an important appointment or a photoshoot coming up, it's more reassuring to schedule treatment with plenty of recovery time rather than right before the event.

If you have allergies, please let us know in advance. PN and PDRN ingredients are derived from fish such as salmon and trout, so if you have a related allergy, you must mention it during your consultation.

If you notice an unusual reaction after treatment, such as a rash or itching that is different from your usual reactions, or severe swelling, don't wait. Contact the clinic where you were treated.

So which product is right for me?

Depending on whether dryness is your main concern or you're mainly looking for improved firmness or fine lines, the consultation may focus on different things. If you're sensitive to pain, it's good to discuss the anesthesia method and injection technique as well. If your skin is thin or bruises easily, plan the timing around any important events in advance.

Rejuran is a treatment to plan around your skin condition, desired results, pain sensitivity, and injection method, rather than something to choose based on the name alone. What matters most isn't getting as many treatments as possible, but finding the right product, method, and interval for your skin. That process can lead to a natural improvement in your skin condition.

This post is a medical advertisement written by the clinic for the purpose of providing medical information. It complies with Article 56(1) of the Medical Advertising Act. Results may vary depending on individual constitution and health conditions, so please make treatment decisions after thorough consultation with your medical team.

Frequently Asked Questions

What effects can Rejuran be expected to have?

Improvements in skin texture, firmness, and fine lines are described as possible results. Because it is involved in collagen and elastin production, some people with dry or rough skin feel less tightness. Some also notice improvements in redness or pores, but results vary significantly depending on the cause and the condition of the skin.

Are PDRN and PN the same ingredient?

They have similar names but are described as having different structures. PDRN is generally described as a relatively small DNA fragment that supports regeneration, while PN is often described as having a larger structure. Both are used for skin regeneration, but because each product differs in particle size, viscosity, and formulation, the feel of use and the administration method may also differ.

How many sessions does it take to feel the results of Rejuran?

Rather than a single session, a common approach is several treatments at regular intervals at the beginning. For very dry or damaged skin, the number of sessions and the intervals may be adjusted. The exact number of sessions and the interval for maintenance treatments should be decided with your medical team based on your current skin condition and how you respond to treatment.

How do hand injection and machine injection differ?

In hand injection, the clinician adjusts depth and amount by area and injects directly. In machine injection, multiple fine needles deliver the solution in evenly spaced amounts. Machine injection may help ease discomfort, but some of the product may leak to the skin's surface and be lost during the procedure. Rather than deciding one is always better, choose based on your pain sensitivity, skin thickness, and treatment area.

Does more embossing mean better results?

Larger or longer-lasting embossing does not necessarily mean the treatment worked better. Embossing is a common reaction that can appear right after treatment as the solution is injected, and it usually subsides over time. It may be more noticeable on dry, thin skin and less visible on thick, firm skin.

What should I do if I have a PN ingredient allergy?

Be sure to tell your provider about any related allergies during consultation. PN and PDRN ingredients are derived from fish such as salmon and trout, which is why this matters. If you develop an unusual rash, itching, or severe swelling after treatment, don't wait. Contact the clinic where you were treated.