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title: "Swollen face: When to See a GP | HealthAnswers"
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# Swollen face: When to See a GP | HealthAnswers

Symptoms

Facial swelling is often due to allergy, dental infection or sinusitis; allergic swelling with breathing difficulty is anaphylaxis — call 999.

Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026

## Quick answer

What could swollen face mean? A swollen face is usually caused by an allergic reaction, a dental infection or sinusitis. Allergic swelling of the lips or eyes with any breathing difficulty is anaphylaxis and needs an immediate 999 call. A dental abscess that spreads into the face also needs prompt treatment, so see a dentist or GP quickly.

General UK health information, not a diagnosis. In an emergency call 999 ; for urgent advice use [NHS 111](https://111.nhs.uk/) (GP out-of-hours in Northern Ireland).

On this page 4 sections

## Common causes of swollen face

- Allergic reactions and angioedema are common causes of facial swelling.
- A dental infection can spread into the face and needs prompt treatment.
- Sinusitis can cause noticeable swelling over the cheeks.
- ACE inhibitor blood pressure medicines can trigger angioedema.
- Facial swelling with a headache in pregnancy needs urgent assessment for pre-eclampsia.

## Understanding facial swelling

Facial swelling has many possible causes, and two things matter most when judging how serious it is — how quickly the swelling came on, and whether breathing is affected. Dental infections and allergic reactions are among the most common causes.

## Causes of facial swelling

An allergic reaction can make the face swell, and in its most severe form — **anaphylaxis** — the swelling comes with breathing difficulty and is a medical emergency. **[Cellulitis](https://healthanswers.co.uk/conditions/cellulitis/)**, a skin infection, and a **dental abscess** can both cause facial swelling that needs treatment.

**Angioedema** is deeper swelling in the tissues beneath the skin. It can be allergic, or it can be a side effect of ACE inhibitor [blood pressure medicines](https://healthanswers.co.uk/treatments/blood-pressure-medicines/).

## Self-care for mild facial swelling

[Antihistamines](https://healthanswers.co.uk/treatments/antihistamines/) can help if the swelling is caused by a mild allergy. If the swelling seems to be coming from a tooth, arrange a dental review so the source of the infection can be treated.

## When facial swelling is an emergency

Anaphylaxis — facial swelling with difficulty breathing — needs a 999 call straight away, and adrenaline should be used immediately if it has been prescribed. During pregnancy, facial swelling that comes with a [headache](https://healthanswers.co.uk/symptoms/headache/) needs urgent maternity assessment, because it can be a sign of pre-eclampsia.

## ! When to get medical help for swollen face

See a GP about facial swelling that does not have any emergency features. Call **999** or go to A&E if there is any difficulty breathing, or if facial swelling comes with a headache during pregnancy. Call **111** for urgent advice when you are unsure what to do.

## Common questions about swollen face

What does an allergic reaction on the face look like? An allergic reaction often makes the lips and the area around the eyes swell. If there is any difficulty breathing alongside the swelling, treat it as an emergency and call 999. Can a tooth abscess cause facial swelling? Yes, a dental abscess can cause facial swelling alongside dental pain. It needs treatment with antibiotics and a prompt dental review so the infected tooth can be dealt with. What is angioedema? Angioedema is deep swelling in the tissues beneath the skin, and it often affects the face. It can be part of an allergic reaction, or it can be triggered by ACE inhibitor blood pressure medicines. Is facial swelling in pregnancy serious? Facial swelling together with a headache during pregnancy should be treated as pre-eclampsia until proven otherwise. It needs urgent assessment by a maternity team.

## Sources

- [NHS — Allergies](https://www.nhs.uk/conditions/allergies)
- [NHS — Angioedema](https://www.nhs.uk/conditions/angioedema)

## How we reviewed this page

Medically reviewed by the [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/)

First published 28 June 2026 Medically reviewed 3 July 2026 Next review due 3 July 2029 or sooner if NHS or NICE guidance changes

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