Can ONDA improve loose abdominal skin after childbirth? The difference between fat reduction and tightening

Distinguish whether skin wrinkles and folds are the main concern independently of weight changes, or whether there is also thick fat, abdominal protrusion, pain or a bulging mass. A 2025 study of 32 participants was a split-abdomen trial using three ONDA Coolwaves sessions for postpartum abdominal laxity and adding CO2 to one side of the abdomen. It observed improvements in appearance ratings and satisfaction, but had no untreated control group and only short follow-up after the final treatment. People with diastasis recti or who were breastfeeding, among others, were excluded, so it is not evidence of safety or functional recovery for those groups. This study does not justify telling everyone that combining CO2 or making three visits is mandatory.

ONDA is a body procedure using microwave energy and a plan for device contact, cooling and handpieces. Different goals for fat and skin appearance require distinguishing actual tips and application methods; it does not mean treating every area with the same energy and time. Research on skin laxity does not simultaneously establish effects on abdominal-wall function, stretch marks and fat volume.

Treatment may aim to change the appearance of mild laxity, but results equivalent to surgery that excises loose skin should not be expected. The study of 32 participants concerns selected skin types and the abdomen; objective elasticity measurements and long-term maintenance data are limited. The same results cannot be applied to larger weight fluctuations or other body areas, and failure to detect rare risks in a study does not mean there is no risk.

Adults whose postpartum recovery and weight are stable may seek consultation to assess goals involving skin, fat and the abdominal wall. Disclose pregnancy, breastfeeding or plans for another pregnancy, cesarean delivery or other surgery, suspected diastasis recti or hernia, wounds, dermatitis, infection or reduced sensation, metallic or electronic implants, and medications. Do not copy a study’s time-since-childbirth criterion as the point when everyone can undergo treatment.

The physician assesses skin, subcutaneous fat, sensation, scars and abdominal-wall symptoms and explains suitability, the device, tips, areas, monitoring and the need for repeat treatment. Heat, redness, swelling, tenderness and sensory changes may occur for several days or longer and vary individually. Assess goals using weight, posture and follow-up photographs taken under the same conditions, rather than circumference immediately after treatment alone. Exercise, abdominal binders, flights and care after returning home should account for both recovery from surgery or childbirth and the treatment response.

Burns, blisters, pigment changes, persistent pain, altered sensation and contour irregularities are possible. Immediately report deep, sharp pain or localized overheating during treatment; afterward, have blisters, skin color changes or reduced sensation assessed. Do not first address painful abdominal protrusion or symptoms of a suspected hernia with a cosmetic procedure. Adding CO2 carries separate risks of skin injury, pigmentation, infection and scarring, as well as an additional recovery burden.

These consultation questions were compiled from the literature and do not represent a clinician interview or an individual prescription. Clinical review of the new article has not yet been completed.

Q. Is all abdominal protrusion after childbirth caused by fat?

A. No. Skin, subcutaneous fat, abdominal-wall and muscle problems may coexist, so an examination is needed.

Q. Must I also have CO2 as in the paper?

A. No. Combination results in a particular study do not mean that the combination is mandatory for every patient or that it is a program offered by SEOLREIM.

Q. Are the results the same during breastfeeding or after a cesarean delivery?

A. The study excluded some groups, including those breastfeeding or with diastasis recti. Safety and appropriate timing must be confirmed through individual recovery, device instructions and examination.

SEOLREIM Clinic states its principles of physician-led consultations and procedures, genuine products, accurate quantities and attentive care. Consultation starts by distinguishing skin condition and goals, then checking the products and devices actually available, approved indications, dose or energy plans, recovery and risks. An official ONDA lifting menu is confirmed; actual abdominal application, device model, tips, programs and quotations are checked during consultation. The study’s combination with CO2 is not presented as a package actually offered by SEOLREIM. Facial signature programs such as Baby Collagen and procedures for abdominal skin laxity also have distinct purposes.

Visitors researching ONDA Korea should disclose childbirth and surgery dates, weight changes, breastfeeding, plans for another pregnancy and abdominal discomfort in advance. Do not expect to confirm results observed over several months in a study during a short stay in Seoul; confirm assessment after returning home and the actual scope of contact. SEOLREIM Clinic is on the 11th floor of the Gangnam8258 Building, approximately 1 minute from exit 3 of Gangnam Station. Book through the website’s KakaoTalk consultation, Naver booking or telephone channels. International visitors comparing dermatology clinics in Gangnam, Seoul, near Gangnam Station or elsewhere in Korea should prepare information on medications, allergies, recent procedures and departure dates. When booking, state your preferred language, such as Japanese, Chinese, Arabic, Mongolian or Indonesian, and whether interpretation is needed, and confirm the actual scope and cost of support. Continuous consultation availability in each language and same-day procedures cannot be guaranteed. During consultation, also agree on how to contact the clinic about adverse reactions after returning home and the follow-up schedule.

Wee et al., 2025 split-abdomen trial of postpartum abdominal laxity in 32 participants: https://pmc.ncbi.nlm.nih.gov/articles/PMC12079721/ ; DEKA ONDA manufacturer information: https://dekalaser.com/products/onda/ ; FDA limitations and risks of noninvasive body contouring: https://www.fda.gov/medical-devices/aesthetic-cosmetic-devices/non-invasive-body-contouring-technologies ; SEOLREIM official menu and location: https://www.sulskin.co.kr/pages/en/product-30 . Manufacturer promotion is distinguished from clinical research, and FDA guidance is not used as proof of US clearance of a specific ONDA model. Evidence and official information checked: 2026-10-20.

Related article: ONDA lifting body contouring: microwave principles, effects and adverse effects https://www.sulskin.co.kr/pages/en/product-245 / Loose skin after major weight loss: the difference between RF tightening and skin-excision surgery https://www.sulskin.co.kr/pages/en/product-299 / Diastasis recti and abdominal body procedures: can HIFEM and RF replace surgery and rehabilitation? https://www.sulskin.co.kr/pages/en/product-335

Author: SEOLREIM content editor / Medical professional review: completed / Review confirmed: 2026-10-23 / Published: 2026-10-20 / Updated: 2026-10-27. This is general medical information and does not replace individual diagnosis or a prescribed procedure plan.