Trap Botox in Gangnam, Seoul for a Slimmer Shoulder Line
Trap Botox is an injection of botulinum toxin into the upper trapezius muscle to relax its bulk, creating a smoother, slimmer neck-to-shoulder line over several weeks. At The Heal Dermatology Sinsa Main Branch in Gangnam, Seoul, a board-certified dermatologist assesses your shoulders and doses each side individually, with little to no downtime.
Written by The Heal Dermatology medical content team · Pending review by a board-certified dermatologist · Updated October 2026
How it works
Trap Botox uses small injections of botulinum toxin into the upper trapezius, the muscle that runs from the neck to the top of the shoulder. Botulinum toxin temporarily reduces nerve signals to the muscle, so a bulky, overactive trapezius gradually relaxes. Over several weeks this can soften the shoulder contour, make the neck appear longer and slimmer, and for some people ease the feeling of tension that comes from habitual shoulder clenching. Results build gradually rather than appearing immediately.
Who it's for
It is typically considered by adults who feel their shoulders look raised or bulky, or who want a smoother neck-to-shoulder line. It is a cosmetic treatment and not a substitute for assessment of neck pain, nerve symptoms, or posture problems, which may need a different medical work-up.
What to expect at The Heal Sinsa
At The Heal Dermatology Sinsa Main Branch, near Sinsa Station and Garosu-gil in Gangnam, your consultation and treatment are carried out 1:1 by a Korean board-certified dermatologist. The dermatologist assesses muscle bulk, shoulder symmetry and your goals, explains realistic results, and maps injection points before treatment. We aim for honest recommendations without overselling, use genuine full-dose products, and treat in private single rooms. English and Traditional Chinese support is available on request. Pricing is confirmed after consultation; see pricing and payment.
Sessions & downtime
- Procedure time: typically 10–20 minutes
- Numbing: usually not needed; fine needles are used
- Onset: changes usually begin within 1–2 weeks, with fuller effect at around 4–8 weeks
- Duration: commonly around 3–6 months, varying by person and dose
- Downtime: minimal; most people return to normal activities the same day
- Aftercare: avoid massage of the area and strenuous upper-body exercise for about 24 hours
Risks & who should avoid
Common side effects include tenderness, small bruises, or mild aching at injection sites. Less commonly, people notice temporary shoulder weakness or fatigue when lifting, especially at higher doses. Treatment is generally avoided during pregnancy or breastfeeding, with skin infection at the site, in neuromuscular disorders such as myasthenia gravis, or with known allergy to botulinum toxin products. Tell the doctor about all medicines, including blood thinners and certain antibiotics.
Planning around your trip to Seoul
Because there is little downtime, Trap Botox can usually be done early in a stay. Results take weeks to develop, so you will often see the final effect after returning home. Flying after injections is generally fine; read our guide on flying after Botox. See international patients and getting here for practical details.
Related
Frequently asked questions
How long does Trap Botox last?
Effects commonly last around three to six months, depending on muscle strength, dose and individual metabolism. Many people repeat treatment when they notice the muscle returning, and the interval can differ between patients. Your dermatologist will suggest timing at follow-up.
Will my shoulders feel weak after Trap Botox?
Most people do not notice functional weakness. Some feel mild fatigue when carrying heavy loads or doing overhead exercise for a few weeks. Dosing is adjusted to your build and lifestyle to keep this risk low, so tell the doctor about sports or physical work.
When will I see results?
Changes usually start within one to two weeks, and the fullest slimming effect is typically seen at around four to eight weeks as the muscle gradually relaxes. Photos taken before treatment help you compare results over time.
Treated by Korean board-certified dermatologists
At The Heal Dermatology, every consultation and procedure is performed or directly supervised by a dermatology specialist (피부과 전문의). Why board certification matters · Meet our doctors · International patient guide · All treatments
Branches: Sinsa (Main) · Jamsil · Dongdaemun · Mapo-Gongdeok
This page is general medical information and does not replace an in-person consultation. Suitability, number of sessions and results vary by individual.