The Complete Korean Skincare Routine with Ultrasound Devices: Step-by-Step Guide + Real Customer Q&A
By Que Park, CSO of Metasonic (SkinLinks) | K-Beauty Ultrasound Technology Expert
The Korean skincare routine is famous worldwide for its multi-step approach, layering lightweight products to achieve deep hydration, brightening, and anti-aging results. But there's a secret weapon that Korean aesthetic professionals have been using for years: therapeutic ultrasound devices.
When you combine the K-beauty layering philosophy with ultrasound technology, the results are dramatically better than either approach alone. Below is our complete guide — enriched with real questions from our customers who use the device daily.
Why Ultrasound Transforms Your Korean Skincare Routine
One of the biggest challenges with any skincare routine is absorption. Most active ingredients only penetrate the outermost skin layer, meaning the majority of your expensive Korean skincare products never reach the deeper layers where they make a real difference.
Through a process called sonophoresis, low-intensity ultrasound waves temporarily increase skin permeability, allowing active ingredients to penetrate up to 10x deeper than topical application alone. In Korean aesthetic clinics, this is standard practice.
The Complete K-Beauty Ultrasound Routine
Step 1: Double Cleanse
Oil-based cleanser first to remove makeup and SPF, then water-based cleanser. Ultrasound works best on a completely clean surface.
Step 2: Toner / First Essence
Apply your Korean toner or first essence. Pat gently — don't rub. Or if you have any special skin booster such as PDRN CICA that has small enough particle size to be easily absorbed, you may use it here.
Step 3: Apply Your Conductive Medium ⭐ The Most Important Step
This is one of the most common questions we receive: "What do I put on my skin before using the device?"
The primary purpose of any medium — gel, serum, essence, or mask pack sheet — is to deliver ultrasonic waves effectively into your skin. Ultrasound cannot travel through air, so your skin must always be moist and well-covered. Never use the device on dry skin.
The good news: if you're using a quality serum, essence, or mask pack sheet, you get a double benefit — effective wave transmission plus deeper absorption of those good ingredients via sonophoresis.
Your options:
- Aloe vera gel — best for sensitive, atopic, or rosacea-prone skin. High water content makes it an excellent ultrasound conductor.
- Ultrasound coupling gel — professional-grade, maximum conductivity. Used in clinics.
- Water-based serums or essences — apply a thicker layer than usual. Excellent for sonophoresis.
- Mask pack sheet — a great option if you don't have gel or serum. Place a premium mask pack sheet (e.g. PDRN CICA mask pack sheet for sensitive skin or to reduce downtime from a previous treatment) on your face to moisturize the skin surface, then glide the device over it. The sheet keeps the skin moist and acts as the conductive medium while also delivering its own ingredients deeper. This is a popular technique among our Korean customers since you don't have to keep checking and reapplying gel while using the device.
- Avoid: oil-based products, thick creams, or silicone-based serums as the primary medium — these block ultrasound transmission.
Step 4: Ultrasound — Lymphatic Drainage Mode (10–15 min) ⭐ K-Beauty Secret
Before applying active serums, run your device in Lymphatic Drainage mode for 10–15 minutes. Move slowly in upward strokes: neck → jawline → cheeks → forehead. For guidance on technique, refer to: How to do Lymph Massage? (Scroll down until you see the title)
This reduces puffiness, removes metabolic waste, and prepares skin to receive active ingredients far more effectively.
Device setting: Lymph Drainage mode, level 2–3 as a start.
[How to Use Estella Portables?] [How to Use SkinLinks Pro?]
Step 5: Active Serum + Sonophoresis Mode (10–15 min) ⭐ The Power Step
Apply your targeted Korean serum (e.g. vitamin C, retinol, niacinamide, or hyaluronic acid), then run the device in Sonophoresis or targeted treatment mode.
Protocol by concern:
- Anti-aging / wrinkles: Wrinkles mode → forehead, eye area, nasolabial folds
- Lifting / firmness: Lifting mode → jawline, cheeks, neck
- Brightening / whitening: Whitening mode → full face in circular motions
- Acne / congestion: Trouble or Acne mode → affected areas only
- Redness / rosacea / atopic: Redness/Soothing mode → gentle, slow strokes at level 1–2
- Stretch marks / cellulite: Stretch Marks or Cellulite mode → body areas, level 3–4
- Breastfeeding support / lymph: Lymph Drainage or Breastfeeding mode (EstellaMOM) → chest area
Device setting: level 2–4 depending on skin sensitivity
[How to Use Estella Portables?] [How to Use SkinLinks Pro?]
Step 6: Mask Pack Sheet (Optional but Powerful)
After your ultrasound treatment, your skin is primed for maximum absorption. Apply a premium Korean mask pack sheet for 15–20 minutes for exceptional hydration and nourishment results. If you used a special mask pack sheet (e.g. PDRN CICA mask pack sheet) in Step 3, you can skip this step.
Step 7: Moisturizer + SPF
Seal with your Korean moisturizer, cream, or sleeping pack. In the morning, always finish with SPF 30+.
Real Customer Questions Answered
These are the most common questions from our community who use the Estella device daily.
💬 "How long should I use it each session? How often?"
For general maintenance, 10–30 minutes per session, 2–4 times per week is ideal. For intensive anti-aging or brightening goals, daily use for the first month is recommended (for daily use, starting at level 1 or 2 is recommended), then 2–4 times per week to maintain results. Each area of the face needs at least 3–5 minutes of focused treatment.
💬 "Can I use it on my scalp?"
Yes — the Lymphatic Drainage and Rejuvenation modes work well on the scalp to improve circulation and support hair follicle health. Use aloe vera gel as the medium and move slowly. Level 2–3 is recommended for the scalp as a start.
💬 "I have rosacea / atopic skin / very sensitive skin. Is it safe?"
Yes, with care. Start at level 1 and use only the Redness/Soothing or Rejuvenation mode. Use your preferred serum, aloe vera gel, or CICA mask pack sheet as your medium — the key is to use ingredients with natural anti-inflammatory properties. Many of our customers with atopic skin report significant improvement in skin barrier function after consistent use.
💬 "Can I use it after laser treatment, Botox, or fillers?"
To help prevent PIH after laser treatment, start at a low intensity level and increase gradually once the skin has healed. Never use on broken or actively healing skin. The Soothing mode can help accelerate post-laser recovery.
⚠️ For Botox: DO NOT USE the device for at least 4 weeks after treatment. Using the device after Botox can spread it to unintended areas.
For fillers, consult your dermatologist before resuming use.
💬 "Is it similar to HIFU? Is it safe to use at home?"
It is fundamentally different from HIFU. HIFU uses high-intensity focused ultrasound to create thermal coagulation points deep in tissue — it is primarily a medical procedure requiring a trained professional. Our devices use low-intensity therapeutic ultrasound, which is non-thermal, non-invasive, and completely safe for regular home use.
💬 "Can pregnant women use it?"
We do not recommend use during pregnancy as a precaution. However, our EstellaMOM device is specifically designed for postpartum care — breastfeeding support, stretch mark treatment, and lymphatic drainage after delivery.
💬 "Which serums work best with the device for sonophoresis?"
Water-based actives work best:
- Vitamin C serum — dramatically enhanced brightening when driven deeper
- PDRN CICA Skin Booster — deep hydration, lifting, pore shrinkage, tightening
- Hyaluronic acid essence — deep hydration that lasts significantly longer
- Niacinamide serum — pore minimizing and brightening effects amplified
💬 "When will I see results?"
Most customers notice immediate results after the first session (See immediate wrinkle results) — reduced puffiness, improved skin tone, and a healthy glow. Cumulative results (lifting, wrinkle reduction, brightening) typically become visible after 2–4 weeks. Significant structural improvement in skin firmness is usually seen after 8–12 weeks.
💬 "Can I use it on my neck, décolletage, arms, and thighs?"
Absolutely. The EstellaMAX (5 frequencies including 1MHz) is designed for body use. The 1MHz frequency penetrates deepest and is ideal for cellulite, stretch marks, and body contouring.
💬 "How do I clean and maintain the device?"
Wipe the handpiece with a soft damp cloth after each use. Do not submerge in water. Store in the protective case away from direct sunlight. Keep the transducer surface free of dried gel residue for optimal performance.
Which SkinLinks Device Is Right for Your Routine?
- EstellaFACE — 8 programs, 3 frequencies (3, 10, 17 MHz). Perfect for focused daily facial routines.
- EstellaMAX — 15 programs, 5 frequencies (1, 3, 5, 7, 10 MHz). Best for comprehensive face and body K-beauty routines.
- EstellaMOM — 14 programs including Breastfeeding and Stretch Marks. Designed specifically for postpartum care.
- EstellaPRO — 26 programs, 4 frequencies. Professional clinic-grade Korean ultrasound device.
Pro Tips from Korean Aesthetic Professionals
- The key is moisture: gel, serum, essence, or mask pack sheet all work. The goal is effective ultrasonic wave delivery to your skin. Good ingredients are a bonus.
- Never use on dry skin: ultrasound cannot travel through air.
- Move slowly: 1–2 cm per second for best results.
- Start at level 1–2: especially for sensitive or troubled skin — increase gradually as your skin adapts.
- Consistency beats intensity: 10–30 minutes daily beats 60 minutes once a week.
- Clean the handpiece after every use — dried gel reduces conductivity.
Que Park, Metasonic | Brand: SkinLinks
🌐 www.skinlinks.kr | Instagram @SkinLinksMetasonic