Firmness and Hydration Are Different Problems | Gangnam Seoul, Korea Dermatology Clinic Guide
"Is it better to do both?"
This is the most frequent question in combination treatment consultations.
It is true that a wider area can be covered. However, if only one is needed, the other only adds to the recovery burden.
It becomes easier to decide if you divide what each treatment does.
Please take just 1 minute to read this.
Roles are Divided
| Category | Thermage FLX | Rejuran HB+ |
|---|---|---|
| Method | Dermal stimulation with high-frequency heat | Injecting ingredients into the dermis |
| Target | Elasticity, sagging | Moisture retention, skin texture |
| Change timing | Over several weeks | Over multiple sessions |
| Sensation | Tightening and contour | Moistness and smoothness |
Feeling "sagging" and feeling "dull" in the mirror are different issues.
If you add a moisturizing treatment for sagging, it will feel moist but the lines will remain the same. If you only do an elasticity treatment for dullness, it will be firm but the skin texture will remain the same.

Cases Where Combination is Advantageous
This is when both problems are actually present together.
- When skin texture is rough and there is inner dryness along with decreased elasticity.
- When there has been an experience of prominent dryness after heat treatment.
- When both changes are progressing together due to age.
The second case, in particular, often comes up in practice. Some people feel temporarily dry after high-frequency treatments, so combining it with a moisturizing treatment can improve the sensation.
(※ Effects and reactions may vary depending on individual skin condition, and suitability for treatment is determined through consultation with medical staff.)

Cases Where a Single Treatment is Better
- When elasticity is maintained, but only skin texture and moisture are issues.
- When sagging is clear and focus should be on elasticity.
- When there is a schedule that requires a short recovery period.
If two treatments are performed on the same day, swelling and redness overlap, which can lengthen the perceived recovery time.
By doing one first and observing the progress before deciding on the other, unnecessary treatments can be reduced.

If You Decide on the Order
If you have decided to proceed together, there is a reason for the order.
By performing heat-based treatments first and injection-based treatments later, you can avoid overlapping injection stimulation when the skin is sensitive from the heat.
Whether to proceed on the same day or divide the timing is determined during consultation, depending on the schedule and skin condition.
The discussion about different approaches by layer was covered in Aging Does Not Happen in One Layer.


Frequently Asked Questions
Is it better to receive both?
It can be advantageous when both problems are actually present together. If only one is an issue, the other may only add to the recovery burden.
Which one comes first?
If decreased elasticity is prominent, address elasticity first. If skin texture and moisture are the main issues, address those first.
Can I receive them on the same day?
It is possible in some cases, but swelling and redness will overlap. If your schedule is tight, it may be safer to divide the timing.
I feel dry after heat treatments.
Some people may feel that way temporarily. Combining it with a moisturizing treatment may improve the sensation.
What are the post-treatment reactions?
For elasticity treatments, warmth and redness may appear. For injection treatments, red spots and swelling may occur. If done together, these may be amplified.
Recovery and Downtime: When Two Reactions Overlap
For single treatments, each typically passes within one to a few days.
If performed together on the same day, the perceived recovery time may be longer.
If you have an important schedule, please inform us in advance during the consultation so we can plan to divide the timing.
How is the Cost Structured?
The cost is not determined solely by the sum of the two treatments.
It varies depending on the area covered for each, the number of injection sessions, whether genuine tips are used, and whether diagnosis and post-care are included.
For an accurate cost, it is more precise to provide guidance after a consultation to confirm the proportion of the two issues.
Visit and Consultation Information
O.N Clinic is conveniently located near Gangnam Station, making it easy to access by subway.
Before your visit, you can easily inquire about any questions you have by Chat Now for Consultation, and through consultation, you can coordinate the combination, order, and appointment schedule.
It is more accurate to determine whether to proceed with a single treatment or a combination after checking your skin condition during an in-person consultation.
Author: Dr. Oh Seung-Min (Representative Director of O.N Clinic, graduated from Seoul National University College of Medicine, Academic Committee Chairman of the Korean Academy of Laser Dermatology and Hair). More details about his career can be found in Medical Staff Introduction. First published 2026-07-10 / Last reviewed 2026-08-15
This article is for general information purposes only, and appropriate treatment and results may vary depending on individual conditions.
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