If surgery abroad goes wrong, the outcome depends less on the country than on what you secured before flying: written records, a named counterparty, and a reachable claim path. In Korea all three have statutory backing. Patients have a legal right to copies of their medical records, registered facilitators must carry medical-liability insurance with defined minimum cover, and a state agency has mediated malpractice disputes since 2012. The gap is that none of it is reachable by default for someone who left the country three days after surgery. This page is the sequence, in order.
Contact the operating clinic first, whatever you now think of them: they know exactly what was done and with what. If symptoms are urgent, any competent local doctor comes before any strategic consideration. Health outranks the claim.
Request the complete medical record in writing: operative notes, anaesthesia record, prescriptions, imaging. In Korea, Article 21 of the Medical Service Act makes copies a patient's right. Records requested in week one are the version of events nobody has had a reason to tidy.
Dated photographs, symptom notes, every message with the clinic, receipts for remedial care. Boring, decisive. Most disputes are eventually decided by whoever kept the better file.
A doctor with no stake in the outcome examines you and puts findings in writing. This is the piece that converts "I am unhappy" into something a mediator or court can weigh.
Every path forks on one question: which of three things happened. A complication is a known risk of surgery occurring despite proper care; it is answered by treatment and, where one was agreed, a revision policy. Negligence is care below the professional standard; it is what claims, insurance and courts exist for. Disappointment with a competently produced result is a third thing, and no legal system compensates it. Being honest with yourself about which category you are in, early, saves months. The written record from steps 02 through 04 is what lets anyone else tell the categories apart.
The claim paths themselves, in escalating order: direct settlement with the clinic, mediation through Korea's state medical-dispute agency, then a civil claim, with the facilitator's statutory liability insurance as a defined source of compensation along the way. The paths, the insurance floors, and the practical barriers of jurisdiction, language and presence are laid out at /recourse/legal/.
Everything above gets an order of magnitude harder from another country, which is the honest argument for arranging it beforehand: a contract naming the operating surgeon, written payment and revision terms, a records request that does not depend on goodwill, and a representative in Korea with standing to act after you have gone home. That pre-arranged version is this site's actual product, and the checklist for judging anyone who offers you the same is at /guides/surgery-abroad-safely/.