Facial swelling from poison ivy: what to know

Poison ivy oil can trigger an itchy, red or blistering rash wherever it touches. The face may swell because the skin is sensitive and because rubbing can move the oil. Swelling near the eyelids can make the eyes difficult to open. This reaction is different from angioedema, which is deeper swelling beneath the skin, although the two can occur together. Facial swelling can also have other causes, such as cellulitis or a food allergy, so the timing and pattern matter.

Wash exposed skin, fingernails, clothing and objects that may carry plant oil with soap and water. Do not scratch or break blisters. A cool, damp compress may calm irritation; keep it clean and avoid applying unfamiliar products near the eyes. A pharmacist or clinician can advise whether an antihistamine or prescribed treatment is suitable, especially for facial involvement. Do not use someone else’s medicine.

Call emergency services immediately for trouble breathing, wheezing, a tight throat, difficulty swallowing, faintness, or rapidly increasing swelling of the lips, tongue or throat; these can signal anaphylaxis. Seek prompt medical assessment for eye pain or vision changes, spreading warmth and tenderness, fever, pus, or swelling that continues to worsen. Emergency treatment may be needed when airway symptoms appear.

Ask which treatment is appropriate for the face, whether the eyes need examination, how to clean contaminated items, and which symptoms should prompt an emergency call.