Ultherapy Prime: 1 Session or 2?
For patients in their 30s–40s, one session is often sufficient. For those in their 50s or with more pronounced sagging, two sessions tend to deliver more stable results. Here's how to know which applies to you.
The most common question I hear during Ultherapy Prime consultations is: "Is one session really enough?" Even with the same device, the answer depends on your skin condition and how far along your aging process is — some patients see great results after a single session, while others benefit from a second session within 6–12 months for more stable, lasting outcomes.
> This post is an informational content summary from Beautystone Clinic in Hongdae.
To put it simply: Ultherapy Prime does stimulate Collagen production after a single session, but if you're in your late 50s or older, or if your skin sagging is more pronounced, a second session tends to produce noticeably better results. Results from the first session typically begin to appear around 2–3 months post-procedure, then continue to gradually improve over the following months.
In this post, you'll learn:
· The difference in results between one vs. two sessions of Ultherapy Prime
· Whether one session is likely sufficient for your case
· When results typically appear and when to schedule a repeat session
· How to care for your skin between sessions to maintain results longerWhat Kind of Results Can You Expect from One Session of Ultherapy Prime?
Ultherapy Prime uses micro-focused ultrasound* to deliver thermal stimulation deep into the skin — targeting the SMAS Layer* and the deeper Dermis. A single session triggers Collagen and elastin production, but the results don't appear immediately — they unfold gradually over time.
Micro-Focused Ultrasound* (MFU): A technology that concentrates ultrasound energy into a precise focal point to deliver thermal stimulation to deep skin layers. It is commonly used in HIFU-based procedures such as Ultherapy Prime.
SMAS Layer*: A thin fibromuscular layer connecting the facial muscles to the overlying skin. It serves as the key structural reference point targeted during sagging correction procedures.
Understanding how deep Ultherapy Prime reaches — viewed in cross-section — makes it easier to appreciate why results accumulate gradually rather than appearing all at once.
A clinical review on the mechanism of micro-focused ultrasound explains that this procedure stimulates the deep Dermis and SMAS Layer at depths of approximately 1.5, 3.0, and 4.5mm. The thermal energy causes Collagen denaturation and contraction, triggering new Collagen synthesis. This is why changes don't appear all at once — they accumulate over several months. That said, the degree of improvement varies depending on each individual's Collagen regeneration capacity and the extent of skin aging.
How Do You Know If One Session Is Enough for You?
If most of the following apply to you, a single session is likely to deliver satisfying results.
- You are in your late 30s to mid-40s
- Your skin sagging is in its early stages (e.g., the jawline is just beginning to soften)
- You generally have good skin resilience and relatively thick skin
- You have little to no prior history of Collagen-stimulating procedures
In these cases, a single session is typically sufficient to adequately stimulate the SMAS Layer, and noticeable results tend to emerge within a few months. Afterward, a maintenance session every 12–18 months is a common approach.
Cases Where a Second Session Leads to More Stable Results
On the other hand, if the following apply to you, scheduling a second session within 6–12 months tends to produce more stable and lasting outcomes.
- You are in your 50s or older with clearly visible skin sagging
- Cheek sagging below the cheekbones is noticeably visible along the side profile
- You've experienced previous Lifting results fading relatively quickly
- Your skin is on the thinner side and Collagen recovery tends to be slower
According to the American Society for Dermatologic Surgery, results from Collagen-stimulating procedures typically appear gradually over 3–6 months, with variation depending on individual recovery capacity. The rationale for a second session is to deliver an additional stimulus after the Collagen response from the first session has fully matured — typically around the 6-month mark — in order to build cumulative results. If the second session is performed too soon (within 3 months), the first session's results haven't yet fully emerged, making it difficult to accurately assess the outcome.
The chart below offers a general sense of how results from a single session tend to develop over time. Please note that this reflects average trends — individual recovery timelines vary.
At Beautystone Clinic Hongdae, We Start by Assessing Your Collagen Recovery Rate
The first thing we look at is your individual Collagen recovery rate. Before the procedure, we review your skin thickness, the extent of aging, and your prior procedure history — all to determine whether one session will be sufficient or whether a second session within 6–12 months is recommended. For first-time patients, we often suggest completing the first session, monitoring the results together, and then deciding on additional sessions based on what we observe.
We're a small clinic within walking distance of Hapjeong Station, so stopping by for a quick result check is easy and low-pressure. Even with the same Ultherapy Prime device, we tailor the session schedule to match your skin's unique recovery pattern — so there's no need to make all decisions at once.
How Should You Care for Your Skin Between Sessions to Maintain Results?
The key to prolonging the results of Ultherapy Prime is daily maintenance that slows Collagen loss.
- Sun protection: Daily Sunscreen application is essential. UV exposure accelerates Collagen breakdown.
- Sleep and nutrition: Collagen synthesis requires protein and vitamin C. Extreme dieting is best avoided.
- Additional Collagen-stimulating procedures: Combining Skin booster sessions from the 6-month mark onward can help build cumulative results.
- Reducing smoking and excessive alcohol: Both are known to accelerate Collagen degradation.
The American Academy of Dermatology advises that consulting with your provider about expected Downtime and realistic outcomes before any cosmetic procedure is a critical step in ensuring safety. In terms of timing, providing an additional stimulus before roughly half of the Collagen gained has been lost — typically around the 12–18 month mark — is generally more efficient from a cumulative standpoint. That said, since the pace of skin change varies from person to person, it's best to discuss session scheduling directly with your provider.
Frequently Asked Questions
Q. What should I do if I don't notice much difference after my first session?
A. Results from the first session typically begin to appear around 2–3 months post-procedure and continue to settle over the following months. It can be difficult to evaluate results before that point, so allowing adequate time before reassessing is the natural approach. If results still feel insufficient after enough time has passed, we'll discuss the option of a second session.
Q. Is there a significant price difference between one and two sessions?
A. There is a cost difference when adding a second session. However, if your case calls for a follow-up procedure within 6–12 months, bundling the sessions upfront may be more cost-effective than booking two separate single sessions. Guidance varies depending on your individual situation.
Q. When is the best time to schedule my next Ultherapy Prime session?
A. We generally recommend a 12–18 month interval. Results tend to be stable around the one-year mark, so providing an additional stimulus shortly after that is efficient from a Collagen accumulation standpoint. The schedule can be adjusted based on how your skin changes over time.
Q. How much Pain is involved?
A. When the micro-focused ultrasound briefly contacts the deeper layers, you may feel a sharp Heat sensation passing through one point at a time. Many patients manage comfortably with topical numbing cream, and additional anesthesia is available for those with higher Pain sensitivity. We recommend discussing Pain management and Downtime expectations with your provider before the procedure.
