Can allergies cause swollen lips or a swollen face?
Yes. Angioedema, swelling without itch in the deep layers of the skin, often appears on the face around the eyes, cheeks or lips. When it lasts only minutes to hours, it is commonly caused by an allergic reaction to drugs or foods, but most cases that keep coming back have no identifiable cause.1
Call 911 if someone
- Is short of breath, wheezing or coughing, or has a tight chest
- Has a tight throat or trouble swallowing
- Has swelling of the lips, tongue or the back of the throat
- Feels dizzy, faints or has a weak pulse
These can be signs of anaphylaxis, a serious allergic reaction that can begin very quickly. If someone is having a serious allergic reaction, call 911.
Based on MedlinePlus on anaphylaxis. General information, not medical advice.
How allergies cause it
Allergic swelling of the lips and face is called angioedema. AAAAI describes it as swelling without itch that often appears on the face around the eyes, cheeks or lips.1 While related to hives, angioedema affects the deeper layers of the skin. It is usually not red or itchy, it often involves the eyelids, lips, tongue, hands or feet, and it commonly occurs with hives but can also occur on its own.2 When it lasts only a short time, such as minutes to hours, it is called acute, and acute angioedema is commonly caused by an allergic reaction to drugs or foods.1
FDA lists face, tongue or lip swelling among the symptoms of food allergy, and these symptoms may appear within a few minutes to a few hours after eating.3
Pollen allergy can swell the lips through food, too. In pollen-food allergy syndrome, the immune system recognizes pollen and similar proteins in certain foods and directs an allergic response to them.4 People with the syndrome typically have allergy to birch, ragweed or grass pollen, and its symptoms include an itchy mouth, a scratchy throat, or swelling of the lips, mouth, tongue and throat.4 ACAAI links birch pollen with foods such as apple, cherry, peach and pear, grass pollen with celery, melons, oranges, peaches and tomato, and ragweed with banana, cucumber, melons, sunflower seeds and zucchini.4 These symptoms are usually confined to one area and do not normally progress beyond the mouth. Symptoms away from the mouth, or anaphylaxis, are rare, although they have been reported in a very small percentage of patients.4
Allergies or something else?
Not all facial swelling is allergic. When angioedema keeps coming back over a long period, most cases do not have an identifiable cause.1
Hereditary angioedema is a rare but serious genetic condition.1 It involves swelling in various parts of the body, including the hands, feet, face, intestinal wall and airways, and it does not include hives.1 It is estimated to affect 1 in 50,000 people worldwide.6
A sting on the face is a special case. For most people, the sting site develops redness, swelling and itching.5 Swelling in the throat or tongue, itching and hives, difficulty breathing and dizziness are among the possible symptoms of anaphylaxis, a severe reaction, instead.5
When to see a doctor
Swelling that reaches the throat is dangerous. Anaphylaxis, a severe, life-threatening allergic reaction, can cause suffocation by swelling of the throat and larynx.3 Swelling of the lips or tongue and swelling of the back of the throat are among the symptoms of anaphylaxis, which can begin very quickly, and MedlinePlus says to call 911 if someone is having a serious allergic reaction.7 If you have symptoms of anaphylaxis after an insect sting, AAAAI says to get emergency medical treatment.5 AAAAI also says to call 911 if you have hives along with fainting, shortness of breath, tightness in your throat, tongue or face swelling, or wheezing.8
If you take a blood pressure drug called an ACE inhibitor and develop angioedema, AAAAI says it is important to consult your doctor.1
To find out whether allergies are behind the swelling, an allergist can examine you and do testing to help determine the cause of a skin reaction.9
Related conditions
Guides
When to get help
See an allergist if
- Allergy symptoms last for several months of the year
- Allergies bring repeated sinus problems, a blocked nose or trouble breathing
- Over-the-counter remedies don’t control your symptoms
- Allergies or asthma get in the way of daily life
- You often wheeze, cough at night or after exercise, or feel short of breath
Based on ACAAI’s “When To See an Allergist”. General information, not medical advice.
Questions
Why do my lips swell after eating raw fruit?
It may be pollen-food allergy syndrome. People with it, who usually have birch, ragweed or grass pollen allergy, can get an itchy mouth, a scratchy throat or swelling of the lips, mouth, tongue and throat from certain raw fruits and vegetables. The symptoms usually subside quickly once the food is swallowed or removed from the mouth.4
How long does allergic face swelling last?
Acute angioedema lasts a short time, such as minutes to hours. When the swelling keeps returning over a long period, each episode can last hours to several days.1
Does allergic swelling itch?
Often not. AAAAI describes angioedema as swelling without itching in the deep layers of the skin, and says it is often seen together with hives.1
Can the face swell without an allergy?
Yes. Hereditary angioedema is a disorder with repeated episodes of severe swelling, most often of the limbs, face, intestinal tract and airway. It is estimated to affect 1 in 50,000 people worldwide.6
Is it normal for a sting on the face to swell?
Some swelling is. When most people are stung, the site develops redness, swelling and itching. If a sting is followed by symptoms such as swelling in the throat or tongue, hives, difficulty breathing or dizziness, it may be anaphylaxis, and AAAAI says to get emergency medical treatment.5
Sources
- Skin Allergy. American Academy of Allergy, Asthma & Immunology. Read on October 16, 2026.
- Allergic Skin Conditions. American Academy of Allergy, Asthma & Immunology. Read on October 16, 2026.
- Food Allergies: What You Need to Know. U.S. Food and Drug Administration. Read on October 16, 2026.
- Pollen Food Allergy Syndrome. American College of Allergy, Asthma and Immunology. Read on October 16, 2026.
- Stinging Insect Allergy. American Academy of Allergy, Asthma & Immunology. Read on October 16, 2026.
- Hereditary angioedema. MedlinePlus Genetics, U.S. National Library of Medicine. Read on October 16, 2026.
- Anaphylaxis. MedlinePlus, U.S. National Library of Medicine. Read on October 16, 2026.
- Acute Hives versus Chronic Hives. American Academy of Allergy, Asthma & Immunology. Read on October 16, 2026.
- Skin Allergy. American College of Allergy, Asthma and Immunology. Read on October 16, 2026.