What should you know about recurrent unilateral facial swelling?

Swelling that comes and goes may reflect angioedema, especially if it follows a food, medicine, insect sting, or other exposure. Infection such as cellulitis can cause warmth, redness, tenderness, and swelling that worsens. Sinusitis or a dental problem may affect one side near the cheek, eye, or jaw. Kidney disease can also contribute to facial puffiness, although it is often more widespread. Note the timing, affected area, pain, rash, fever, and possible triggers.

Arrange a GP or urgent-care assessment if the swelling keeps returning, even when it settles between episodes. Take photographs during an episode and record foods, medicines, cosmetics, dental work, infections, and insect contact beforehand. Do not start leftover antibiotics or repeatedly use someone else’s allergy medicine. A clinician may examine your skin, mouth, teeth, nose, and eyes and review medicines and medical history.

Call emergency services immediately if swelling affects the lips, tongue, throat, or breathing, or if you feel faint, confused, or suddenly very unwell; these can be signs of anaphylaxis. Seek same-day care for fever, rapidly spreading redness, severe pain, eye involvement, or difficulty opening the mouth. Anaphylaxis emergency treatment is time-critical, so do not wait for facial swelling to improve.

Could this pattern fit angioedema, cellulitis, sinusitis, food allergy, or a dental cause? Which warning symptoms should prompt emergency help? Should I keep a trigger diary or arrange allergy, dental, sinus, or kidney evaluation?