Deoxycholic acid injections for a double chin: fat reduction, swelling and jaw-nerve injury precautions

Deoxycholic acid is a bile acid that destroys cell membranes, inducing inflammation and clearance of fat cells at the injection site. This reaction itself causes swelling and pain. Grid-pattern injections must follow the product’s submental indication and anatomical boundaries. “Fat-dissolving injections” may include mixtures of different ingredients, so verify deoxycholic acid content, product name and Korean-approved areas.

Appropriate submental fat may show volume reduction without surgery, but treatment is not complete in one session and does not automatically tighten skin. A meta-analysis reported better fat and patient-satisfaction measures than placebo, but injection-site adverse events were common. In 2026, FDA added label information about serious adverse events after unapproved use outside the submental area; do not independently extend treatment to the abdomen, arms or thighs.

Adults with pinchable submental subcutaneous fat may consult after assessment of skin elasticity and expectations. Report substantial excess skin, a small chin, neck muscle bands, prominent submandibular glands, thyroid or lymph-node problems, prior chin surgery, liposuction, threads or fillers, facial-nerve disease, swallowing problems, medicines increasing bleeding risk, pregnancy, breastfeeding and infection. Lifestyle and metabolic assessment comes first if the aim is obesity treatment or overall weight loss.

Examine the jawbone, nerves, salivary glands and central neck structures, mark the actual subcutaneous-fat extent, and confirm product name, total amount, sessions and approved uses. Swelling, tenderness, bruising, numbness and firmness may be conspicuous afterward; consider photography, events and flights. Use clean cold compresses and analgesics as instructed; do not strongly massage or overlap other fat-dissolving injections.

Swelling, pain, bruising, erythema, reduced sensation, nodules and firmness are common. Marginal mandibular nerve injury can cause an asymmetric smile; dysphagia, skin ulceration or necrosis, infection, scars and vascular injury may occur. New smile asymmetry, difficulty speaking or swallowing, blisters, blackening skin, pus, heat or fever require immediate assessment. Avoid self-injection and unapproved injections in the anterior neck or outside the submental area.

The answers below are literature-based consultation questions, not a clinician interview or individual diagnosis; actual medical review remains incomplete.

Q. How many days does swelling last?

A. Depending on reaction severity and session, it can last days to weeks; an exact schedule cannot be guaranteed.

Q. Can the same injections be used on my abdomen or arms?

A. Approval differs by product, and deoxycholic acid carries warnings of serious adverse events outside the submental area; do not extend use independently.

Q. Can I wait if one corner of my mouth drops when smiling?

A. A marginal mandibular nerve problem is possible; obtain immediate assessment at the treating clinic.

Systematic review and meta-analysis of deoxycholic acid injections (https://pmc.ncbi.nlm.nih.gov/articles/PMC10570630/), review of serious adverse-event management (https://pmc.ncbi.nlm.nih.gov/articles/PMC11381091/), FDA notice dated 2026-09-15 about adding adverse events outside the submental area to the label (https://www.fda.gov/drugs/drug-safety-communications/fda-approves-additional-information-labeling-kybella-deoxycholic-acid-injection-warning-adverse) were consulted. Evidence checked on 2026-10-04. The US label does not replace Korean approval; check Korean product instructions separately.

SEOLREIM Clinic describes its principles of consultations and procedures performed personally by the clinic director, genuine products, appropriate quantities and attentive care. Consultation starts by distinguishing skin condition and goals, then checking the products and equipment actually available, approved uses, the dose or energy plan, recovery and risks. For a double chin, the clinic director personally distinguishes subcutaneous fat, skin elasticity, chin size, muscle and salivary glands. During consultation, confirm the actual deoxycholic acid product, Korean approval, authenticity and quantity records, and differences from signature body/contouring programs such as Onda and InMode.

Visitors seeking double-chin injections or body contouring in Korea should confirm ingredients, approved areas, expected swelling, emergency contact for asymmetric smile or dysphagia, follow-up before departure and access to treatment after returning home. SEOLREIM Clinic is approximately 1 minute from Exit 3 of Gangnam Station, on the 11th floor of the Gangnam 8258 Building. You can book through the website’s KakaoTalk consultation, Naver booking or telephone channels. Overseas visitors comparing dermatology clinics in Gangnam, Seoul, the Gangnam Station area or Korea should prepare details of medications, allergies, recent procedures and departure dates. When booking, state your preferred language, such as Japanese, Chinese, Arabic, Mongolian or Indonesian, and whether you need an interpreter, to confirm the actual scope and cost of support. Continuous consultation availability in each language and same-day procedures cannot be confirmed. Also agree on contact arrangements for adverse reactions after returning home and the follow-up schedule during consultation.

Author: SEOLREIM content editor / Medical-professional review: completed / Review confirmed: 2026-10-23 / Published: 2026-10-04 / Updated: 2026-10-27. This is general medical information and does not replace individual diagnosis or a procedural prescription.