Facial swelling from a bug bite

A bite can trigger redness, itching, warmth and puffiness around the affected area. Facial tissue may swell noticeably even when the bite itself is small. An expanding itchy rash, swelling of the lips or tongue, wheeze, vomiting or dizziness suggests an allergic reaction such as angioedema or anaphylaxis. Increasing pain, heat, pus, red streaking or fever after the bite can indicate cellulitis. A bite near the eye deserves extra caution if vision changes or eye movement hurts.

Wash the area gently with soap and water, then apply a cool compress wrapped in clean cloth. Avoid scratching, squeezing or applying household chemicals. Ask a pharmacist or clinician which itch treatment is suitable, especially for a child, pregnancy, allergies or regular medicines. Keep the bite clean and observe whether the swelling is stable, improving or spreading. If a stinger is visible, follow local medical advice for safe removal rather than digging into the skin.

Call emergency services immediately for difficulty breathing, throat tightness, tongue swelling, faintness, widespread hives or rapidly worsening facial swelling. Seek same-day care for swelling around the eye, severe pain, fever, pus, spreading redness or reduced vision. Arrange a review if the reaction is not improving, the insect is unknown and symptoms are unusual, or you develop signs of infection.

Ask whether the reaction looks local, allergic or infected; which treatment is safe for you; whether you need an allergy action plan; and what changes should trigger emergency care. Note when the bite occurred and photograph the area as it evolves.