Skin Boosters (Rejuran & Hyaluronic) in Seomyeon, Busan
Skin boosters (스킨부스터) are micro-injections of substances such as polynucleotides (PN, e.g., Rejuran) or thin hyaluronic acid placed just under the skin to improve hydration, texture, fine lines and elasticity. In Seomyeon, Busan, a session usually takes 20–40 minutes after numbing cream. Small bumps fade in 1–3 days; a course of about 2–4 sessions spaced 2–4 weeks apart is common.
Independent patient guide · Medically informative, not a substitute for a doctor's advice · Last reviewed:
What are skin boosters?
Skin boosters differ from volumising fillers: rather than adding shape, they are spread in tiny amounts across the face in the superficial dermis to improve skin quality. Two families are popular in Korea:
- Polynucleotides (PN): DNA fragments, often derived from salmon, marketed as Rejuran (리주란) and similar products. They are thought to support tissue repair and collagen production, and are popular for fine lines, sensitive skin and texture.
- Hyaluronic acid boosters: very soft HA that attracts water, improving hydration and glow.
Some clinics combine boosters with lasers or use variants for the under-eye area or acne scars.
Who is it for?
- People with dry, dull or thin skin
- Early fine lines and crepiness on the face or neck
- Those recovering skin quality after lasers or with acne-scar texture
People with fish or salmon allergy should discuss PN products carefully. Boosters are not a substitute for lifting or volumising treatments when sagging or hollowness is the main issue.
What happens at the clinic
- Skin assessment: the dermatologist evaluates hydration, texture and concerns.
- Numbing: anesthetic cream is applied for 30–45 minutes.
- Injection: many tiny injections across the treatment area, by hand or with an injector.
- Soothing: a calming mask or cooling to settle redness.
- Schedule: the next session is planned a few weeks later.
Recovery and aftercare
Expect small raised bumps at injection points, especially with PN, which usually settle within 1–3 days, plus mild redness and occasional pinpoint bruises. Avoid makeup for the rest of the day, and skip saunas, alcohol and intense exercise for 24 hours. Results build gradually over the course; maintenance every few months is common.
Risks and side effects
- Bumps, redness, swelling and bruising
- Temporary lumps if product is placed unevenly
- Infection, rare with sterile technique
- Allergic reaction, uncommon
Choosing a clinic for skin boosters in Seomyeon
- Choose a dermatologist or licensed physician who explains which booster suits your skin concern.
- Ask to see the product packaging and confirm it is an approved brand.
- Ask whether injections are manual or device-based and why.
- Ask how many sessions and what interval they recommend.
- If you have upcoming events, ask about bump downtime for your chosen product.
Planning around a trip
Because a course involves several sessions, visitors often do one session per trip. Book early in your stay so bumps settle before photos. Seomyeon clinics are easy to reach via Line 1 or Line 2.
Key facts
- Treats: dehydrated or dull skin, fine lines, crepey texture, enlarged pores, acne-scar texture
- Types: polynucleotide (PN/PDRN, e.g., Rejuran), non-crosslinked or lightly crosslinked hyaluronic acid
- Delivery: manual micro-injections or injector devices
- Session time: about 20–40 minutes plus numbing
- Course: typically 2–4 sessions, 2–4 weeks apart
- Downtime: small raised bumps and redness for about 1–3 days
- Typical NHI coverage: not covered (cosmetic)
Frequently asked questions
What is Rejuran?
Rejuran is a brand of polynucleotide (PN) injectable developed in Korea, often called a "salmon DNA" booster. It is injected superficially to support skin repair and improve texture, fine lines and elasticity over a course of sessions.
How many skin booster sessions do I need?
A typical course is 2–4 sessions spaced 2–4 weeks apart, followed by maintenance every few months. The exact plan depends on the product and your skin condition.
Do skin boosters hurt?
Numbing cream is applied, but many people still feel prickling, especially with PN products. Discomfort is short-lived. Some clinics use injector devices or added anesthetic to make it more comfortable.
How long do the bumps last after Rejuran?
Small raised bumps usually flatten within 1–3 days. Mild redness or pinpoint bruises can last slightly longer. Plan important events at least a few days after treatment.
Skin booster vs filler: what is the difference?
Fillers add volume and shape to specific areas. Skin boosters spread tiny amounts across the skin to improve hydration and quality without changing contours. They are often used together for different goals.
Medical disclaimer: Seomyeon.Clinic is an independent information directory. Content is for general education and does not replace a consultation with a licensed physician. Suitability, risks, results and costs vary by person and clinic. In an emergency in Korea, call 119.