Rejuran is a regenerative treatment using salmon-derived ingredients to send recovery signals to cells within the skin.
Immediate redness and small bumps usually settle within 1 week, but noticeable texture and elasticity changes often require 3–4 sessions at 2–4-week intervals.
Recovery time and session count should therefore be understood together through the same mechanism, rather than separately.
➊How does Rejuran Healer work?
Rejuran Healer, containing salmon-derived regenerative ingredients, is not a volumizing filler; it sends skin cells a signal to repair.
Injecting these ingredients into the superficial skin, or dermis, is understood to support the process by which cells calm redness and replenish collagen that provides firmness.
Understanding this mechanism explains why recovery time and session count are linked questions.
Many people asking about Rejuran in Cheongdam begin with, “How much does it hurt, and when will the visible signs disappear?”
But visible recovery, or downtime, and internal recovery as collagen accumulates happen at different speeds.
Separating these two makes session planning more accurate.
The key is that visible recovery proceeds over days, while recovery within the skin takes weeks.
➋How many days do swelling and raised bumps take to settle?
Immediately afterward, injection sites may show slight swelling, redness, and small raised bumps, often called embossing.
These bumps are a natural reaction as the ingredient settles in the dermis; although individuals vary, they are reported to usually settle between 3 days and 1 week.
Makeup is possible from the next day in most cases, and cleansing or light daily activities are not substantially restricted.
However, it is advisable to avoid saunas, strong massage, and outdoor activities with intense ultraviolet exposure for the several days until swelling settles.
Bruising may also occur and usually fades naturally within 1 week.
| Category | Approximate timing | Notes |
|---|---|---|
| Swelling and redness | 1–3 days | May be eased with cold compresses |
| Raised bumps | 3 days–1 week | Temporary papules that resolve naturally |
| Bruising | Up to about 1 week | Occurrence varies between individuals |
| When makeup can resume | From the next day | Varies by area |
➌When are the actual effects noticeable?
Visible swelling settling does not mean the intended improvement in elasticity and texture is complete.
Related research has reported wrinkle measures beginning to improve around 6 weeks, with the clearest changes around 3 months.
There are also reports of visible texture improvement within 3 months, maintained for around four further months.
The end of downtime from swelling and bumps is therefore different from the time when actual effects accumulate.
“The end of recovery does not mean the effect has ended; it is closer to the point from which collagen gradually begins to accumulate.”
➍Why 3–4 sessions, and why 2–4 weeks apart?
Skin cells need a certain amount of time to respond and produce collagen.
Rejuran is therefore commonly planned as 3–4 initial sessions at 2–4-week intervals, followed by maintenance every 4–6 months.
| Situation | Recommendation | Reason |
|---|---|---|
| Shortening the interval | Not recommended | Insufficient recovery time; accumulating irritation |
| Lengthening the interval | Not recommended | Interrupted cellular response may reduce perceived effects |
| Basic plan | 3–4 sessions at 2–4-week intervals | Based on the collagen formation cycle |
| Subsequent maintenance | Every 4–6 months | To maintain perceived effects |
Some changes, such as hydration, are relatively quick, but visible changes such as fine lines or elasticity often become apparent after completing the course.
- ✓ 1 session: Mainly changes in hydration
- ✓ 3–4 sessions: Noticeable texture and elasticity changes
- ✓ Every 4–6 months afterward: Maintenance
➎Side effects and situations requiring caution
The most common reactions are the swelling, bruising, and raised bumps described above, most of which are temporary.
Rarely, palpable nodules or persistent redness may occur; if these symptoms continue for more than 1 week, clinical assessment is necessary.
Because the ingredients are salmon-derived, any fish or shellfish allergy must be disclosed before treatment.
Pregnancy, breastfeeding, a history of autoimmune disease, or active inflammation at the treatment site require avoiding treatment or a separate clinical assessment.
➏Who I recommend Rejuran for
I primarily recommend Rejuran Healer when skin has become dry and rough, or when fine lines accompany an overall loss of elasticity.
It suits people who want to improve skin quality itself rather than add volume as filler does.
The situation differs if someone wants rapid filling of a deep hollow such as a nasolabial fold.
In those cases, Rejuran Healer alone may not provide the desired change, and a volume-replacing approach such as filler is often more suitable.
Rather than force a longer course in such situations, I try to explain honestly only what is actually needed.
Ultimately, recovery time and session count are not fixed answers; they are decided by reviewing skin condition, concerns, and lifestyle together during consultation (individual variation applies).
“For a change in skin quality, Rejuran Healer may suit; for replacement of volume itself, filler may be the better choice.”
QFrequently asked questions
Most people can resume daily life, including makeup, the next day.
Bumps and redness vary individually but generally settle noticeably between 3 days and 1 week.
They are temporary papular elevations as the ingredient settles in the dermis, usually resolving naturally between 3 days and 1 week.
If they persist, clinical assessment is needed.
A single session may provide some hydration, but visible wrinkle or elasticity changes need time for collagen accumulation and are often felt after 3–4 sessions.
Skin cells need time to respond and form collagen.
Overly short intervals may simply add irritation and interfere with recovery, so they are not recommended.
First, skin condition and concerns are assessed, then an injection plan is made for each area before treatment.
Session count and intervals are determined after examination, and results vary between individuals.
References
- Systematic review of improvements in wrinkle and skin texture measures, 2024
- Controlled study of PN ingredients and hydration improvement, 2024
Rejuran Healer is less about forcibly filling skin than about opening a path for it to recover.
Rejuran uses salmon-derived ingredients to support cellular recovery signals; planning downtime and session count together helps bring results closer to the goal.
The specific recovery period and number of sessions vary with skin condition, so I recommend confirming them directly during consultation.
You can book a detailed consultation below.
Dr. Park Hyungkwon, Board-Certified Dermatologist and Medical Director, LUNN Clinic
After treatment, redness, bruising, swelling, temporary papules (raised bumps), or nodules may occur. Prior consultation is necessary for people with fish allergies (disclosure related to Article 56 of the Medical Service Act).
Treatment and procedure results may vary according to the individual's condition.
This article is intended to provide medical information.
