임신 중 구강 관리: 잇몸 출혈, 입덧, 치과 진료까지

Swollen gums that bleed when you brush, or a sour taste after bouts of morning sickness, are common in pregnancy. Oral care during pregnancy does not need to be complicated, but it does need to be regular and done right. This article brings together guidance from the American Dental Association (ADA), the American College of Obstetricians and Gynecologists (ACOG), the UK NHS and Vinmec, a Vietnamese hospital group.

Why are gums more inflamed and prone to bleeding in pregnancy?

• Hormonal changes: according to ADA/MouthHealthy, higher hormone levels change how gums react to plaque, causing swelling, tenderness and slight bleeding when you brush or floss. A leaflet from Oxford Health NHS also notes that hormonal changes make gums more vulnerable to plaque.
• Timing: Vinmec says the problem often becomes noticeable from month 2, may worsen in months 7–8 and eases in month 9; gingivitis accounts for about 60–75% of oral problems in pregnant women (Vinmec, Vietnamese source).
• Do not ignore it: the ADA notes that gingivitis can progress to more serious gum disease; your dentist may suggest more frequent cleanings.

What is a pregnancy tumour of the gums?

• It is an overgrowth of gum tissue that usually appears in the second trimester, often between teeth (ADA).
• It is not cancer; it tends to look red, bleeds easily, may be linked to plaque between teeth and usually disappears after birth.
• Vinmec reports that it affects about 2–10% of pregnant women. See a dentist if it gets in the way of eating, bleeds easily or does not go away after birth.

How does morning sickness affect tooth enamel?

Stomach acid raises acid levels in the mouth and can damage enamel (ADA). Recommendations:

• Rinse with plain water after each time you are sick (Oxford Health NHS).
• Do not brush straight away: enamel is softened by acid; the NHS leaflet advises waiting about an hour before brushing.
• Baking soda rinse: the ADA says your dentist may suggest rinsing with a teaspoon of baking soda mixed with water; Vinmec also recommends a diluted baking soda rinse.
• Frequent or prolonged vomiting: tell your obstetrician and mention it to your dentist.

Are dental visits safe during pregnancy?

• ACOG: Committee Opinion No. 569 (reaffirmed 2025) states that studies have not raised concerns about the safety of dental services during pregnancy, and that pregnant women should be counselled on the importance of oral health care. ACOG is also clear that dental treatment in pregnancy has not been shown to improve birth outcomes. ACOG
• ADA: the ADA, ACOG and the American Academy of Pediatrics (AAP) all encourage dental visits while expecting. Dental X-rays emit very low doses of radiation and ACOG considers them safe; local anaesthetics such as lidocaine are considered safe for mother and baby.
• Tell your dentist right away that you are pregnant, with how far along you are, your due date and every medicine or vitamin you take. High-risk pregnancies may require postponing some procedures.
• Timing: a Vinmec Da Nang dentist says the second trimester is a good window for low-risk procedures such as fillings and scaling (Vinmec, Vietnamese source).
• When to go sooner: bleeding, swollen or painful gums, or bad breath; seek an urgent appointment for loose teeth, ulcers, red patches or a lump in the mouth (NHS).

Oral care during pregnancy: daily habits

Four basic habits that the ADA, NHS and Vinmec all mention:

1. Brush twice a day with fluoride toothpaste: at least 2 minutes each time; spit, and do not rinse straight away with water.
2. Clean between teeth every day: with floss, interdental brushes or a water flosser.
3. Rinse with water after morning sickness: wait about an hour before brushing.
4. See a dentist during pregnancy: share how far along you are and the medicines you take.

On interdental cleaning, a multicentre randomised trial (Carrouel et al., 2026) of 323 first-time pregnant women at risk of preeclampsia found that daily interdental brushing from week 12 cut the share of bleeding gum sites from 56% to 12% by month 8, while the usual-care group stayed about the same. One author reported fees from an oral care company outside this study. PubMed

We did not find a trial of water flossers specifically in pregnant women. A water flosser is an option if floss or interdental brushes are hard for you, or your gums are tender; start on the gentlest mode. General evidence on water flossers and bleeding gums is covered in can a water flosser reduce gum inflammation and bleeding. The ADA also notes that fatigue, a sensitive gag reflex or sore gums can make your routine harder, so pick the tools and time of day that feel most comfortable.

What to eat for healthy teeth in pregnancy

• Calcium: dairy, broccoli, kale and calcium-fortified foods (ADA/MouthHealthy).
• Vitamins: vitamin C (strawberries, kiwi) supports gum health; vitamin A from sweet potatoes and carrots; vitamin D from fatty fish. The ADA recommends getting nutrients mainly from food and asking your doctor about a prenatal vitamin.
• Your baby's teeth: baby teeth start forming between about the third and sixth month of pregnancy (ADA).
• Sugar: cut down how often you have sugary foods and drinks and try to keep them to mealtimes; between meals, choose water or unsweetened milk (Oxford Health NHS).

Product picks from Inmax

• M159: curved 256 g body, 300 ml tank, 4 modes (Pulse/Soft/Normal/Power), 40–130 PSI — the Soft mode suits days when gums are tender.
• M149Art: starts at 30 PSI (30–120 PSI), gentler than other M149 models; 5 modes and a UV light inside the tank.
• M5: electric toothbrush with Gum Care and Sensitive modes, 20,000 vibrations per minute, slim 199.4 mm body, IPX7 waterproof.

You can compare specifications or contact Inmax for advice.

Frequently asked questions

Are bleeding gums in pregnancy dangerous?

They are usually caused by pregnancy gingivitis and improve with thorough cleaning; Vinmec says about half of cases resolve after birth. If your gums are very swollen and sore, teeth feel loose or bleeding is hard to stop, see a dentist.

Can I have a scale and clean while pregnant?

Yes. According to Vinmec, the second trimester is a good time for scaling and fillings; the ADA advises getting cleanings and needed procedures done before the baby arrives.

Can I use a water flosser while pregnant?

We found no official source advising against it. It is one way to clean between teeth; start on the gentlest mode with lukewarm water. If your gums bleed heavily or you have a gum growth, see a dentist first.

Are dental X-rays harmful during pregnancy?

The ADA cites ACOG's view: dental X-rays emit very low doses of radiation and are considered safe in pregnancy; the dental team limits exposure to the area being imaged.

This article is for general information, compiled from the sources linked in each section; it does not replace advice, diagnosis or treatment from your obstetrician or dentist.