Why pregnancy changes your gums
Rising progesterone and oestrogen increase gum vascular permeability and alter the local immune response. The result is an amplified inflammatory reaction to the same bacterial load you had before pregnancy. This is the key point patients find reassuring: your hygiene has not necessarily deteriorated — your tissue response has changed.
Reported prevalence ranges from roughly 40% to 70% of pregnancies. Onset is typically in the second month, peaking around the second trimester, and it usually resolves within a few months of delivery as hormones normalise.
Timeline and what is safe when
| Period | Gum condition | Dental care |
|---|---|---|
| 1st trimester | Symptoms beginning; nausea may limit brushing | Urgent care and cleaning fine; elective work usually deferred |
| 2nd trimester | Peak swelling and bleeding | Optimal window for cleaning and necessary treatment |
| 3rd trimester | Still elevated; may plateau | Possible, but lying flat gets uncomfortable — keep sessions short |
| Postpartum | Resolves over weeks to months | Re-evaluate; treat anything deferred |
Pregnancy gingivitis vs. pyogenic granuloma
Some patients develop a distinct red, lobulated lump on the gum, usually between teeth, that bleeds readily. This is a pyogenic granuloma — sometimes called a pregnancy tumour, which is an unfortunate name because it is entirely benign and not a neoplasm. It typically regresses after delivery. It is removed during pregnancy only if it bleeds heavily, interferes with eating, or grows quickly.
The safety questions everyone asks
- Local anaesthetic — lidocaine is widely used in pregnancy and is considered appropriate. Untreated dental infection carries more risk to a pregnancy than the anaesthetic does.
- Dental radiographs — the dose from a dental film is very low and the beam is directed away from the abdomen, with lead shielding used. Necessary radiographs are taken; routine screening films are usually postponed.
- Scaling — safe throughout, and specifically beneficial, since removing calculus reduces the bacterial load your amplified immune response is reacting to.
- Antibiotics — several are established as appropriate in pregnancy; the choice is made with your obstetrician when needed.
Managing it day to day
- Soft-bristled brush, gentle technique. Bleeding gums still need cleaning; skipping the area makes it worse, not better.
- Keep cleaning between the teeth. This is where the inflammation concentrates.
- If nausea prevents brushing, rinse with water and try brushing at a different time of day, or use a small-headed brush with unflavoured paste.
- After vomiting, rinse — do not brush immediately. Stomach acid softens enamel, and brushing right away abrades the softened surface. Rinse with water, then wait about 30 minutes.
- Frequent snacking raises decay risk; if you are eating small meals often, rinse with water in between.
Why not just wait until after delivery
Untreated gum inflammation does not pause. It can progress to periodontitis, which involves irreversible bone loss, and associations exist between maternal periodontal disease and preterm birth and low birth weight. The postpartum period — with a newborn — is also the least practical time to start a course of dental treatment. The second trimester exists as a treatment window for exactly this reason.