Aftercare while travelling: sun, flights, sauna and makeup

How do I protect treated skin from the sun in Seoul?

Post-inflammatory hyperpigmentation, the brown marks that can follow a laser, has been reported after both CO2 resurfacing and picosecond treatment in Asian skin. In a retrospective study of 82 Asian patients treated with fractional CO2 for acne scars, 73% developed darkening and in 32% it lasted more than three months^[1]. In a separate study of 12 Asian patients treated with a picosecond laser for pigmented lesions, the reported rate was 4.8%^[2]. The risk varies with the diagnosis, the settings and your skin type. Sun protection helps reduce additional pigmentation while your skin recovers.

UV is only part of it. Visible light can trigger pigmentation in darker skin, and ordinary broad-spectrum sunscreens do not block it well; tinted sunscreens with iron oxides do^[3]. Labels rarely help: in a 2026 analysis of 37 tinted sunscreens, almost all did not list iron oxide as an active ingredient, and few brands disclosed the amount^[4]. Look for iron oxides in the full ingredient list, or ask the clinic which product it recommends.

• Use shade and a wide-brimmed hat from the moment you leave the clinic.
• Start sunscreen on treated areas when the clinic’s wound-care instructions allow. Choose broad-spectrum SPF 30 or higher, and reapply about every two hours outdoors and after swimming or sweating, as the American Academy of Dermatology advises (how to apply sunscreen, checked 2026-10-18).
• Plan sightseeing for morning or late afternoon in the first days after a laser.

Is it safe to fly after a skin procedure?

Confirm your departure timing with the treating clinic before the treatment, allowing for wound care and any planned review visit. That decision belongs to the doctor who knows the procedure and settings.

Dry cabin air is a separate, practical problem. On long-haul flights, relative humidity in the cabin fell below 10% within two hours of take-off, and skin hydration on the cheeks dropped by up to 37%, in a small study of eight healthy women^[5]. Pack for it.

• Carry the moisturiser or barrier cream the clinic gave you in your cabin bag.
• Reapply during the flight, and skip makeup on board if you can.
• Do not pick at crusts or peeling skin, however dry it feels.
• Keep the clinic’s contact details and your treatment record in your phone.

Timing your departure also matters for injectables. Filler complications are classed as immediate (within 24 hours), early (24 hours to 4 weeks) or late (after 4 weeks)^[6], so part of the window always falls after you leave. That is one more reason to have injections early in the trip.

When can I go to a sauna or jjimjilbang after treatment?

Korean bathhouses (찜질방, jjimjilbang) and saunas combine heat, steam, sweating and shared water. Non-ablative laser treatment, fresh injection punctures, and skin resurfaced by CO2 or microneedling each need different aftercare. Follow the instructions for your procedure, ask for a number of days, and have it written on the aftercare sheet.

When can I wear makeup again?

The same logic applies: the answer depends on whether the skin surface was punctured or resurfaced, and how far it has healed. Ask the clinic when you can restart makeup, and whether a tinted sunscreen will do in the meantime; it also covers redness. Ask too before restarting retinoids, acids, scrubs or other active skincare.

Which warning signs need care straight away?

The first two rows are emergencies. The FDA calls unintentional injection into a blood vessel the most concerning risk of dermal fillers: it can cause tissue death, vision problems including blindness, and stroke, and the FDA advises seeking immediate medical attention for unusual pain, vision changes, white, grey or blue skin near the injection site, or signs of stroke (FDA, dermal fillers, checked 2026-10-18). A 2026 review adds that prompt recognition and treatment, including hyaluronidase, are critical to limit skin damage^[7]. In Korea, 119 is the number for medical emergencies (VisitKorea, emergency situations, checked 2026-10-18). Infection is the problem most often reported in people who return home with complications after cosmetic surgery abroad^[8]. Cold sore outbreaks have been reported after CO2 resurfacing^[9].

What if a problem appears after I get home?

1. Send clear photos and a short description to your contact at the clinic.
2. See a doctor at home, and bring your treatment record and receipt.
3. Ask the clinic whether its doctor can advise your doctor directly. Korean law lets doctors at registered clinics give knowledge, technical support and patient counselling to doctors abroad by video or other remote means (foreign patient Act, Article 16, checked 2026-10-18).
4. If you cannot resolve a dispute with the clinic, the Korea Medical Dispute Mediation and Arbitration Agency handles counselling, mediation and arbitration, with English forms (K-medi, checked 2026-10-18).