What allergy can cause swollen lips

There are several diverse types of angioedema, each of which has a diverse cause.

It can be caused by:

  1. an allergic reaction, such as a food allergy – this is known as allergic angioedema
  2. a medicine, such as angiotensin-converting enzyme (ACE) inhibitors for high blood pressure – this is known as drug-induced angioedema
  3. a genetic fault that you inherit from your parents – this is a rare, lifelong condition that usually starts in childhood called hereditary angioedema

But in numerous cases, it’s not clear what causes angioedema.

What allergy can cause swollen lips

This is known as idiopathic angioedema.

Read more about the causes of angioedema.

Cat allergens

Eight cat allergens own been recognized by the World Health Organization/International Union of Immunological Societies (WHO/IUIS) Allergen Nomenclature Sub‐Committee. Fel d 1 is the most prominent cat allergen, accounting for 96% of human cat allergies.[2] The remaining cat allergens are Fel d 2-8, with Fel d 4, an urinary protein, occurring the most in humans among the other seven allergens.

What allergy can cause swollen lips

Every cats produce Fel d 1 including hypoallergenic cats. The main way these allergens are spread is through a cat’s saliva or dander, which gets stuck on clothing. A study found that 63% of people allergic to cats own antibodies against Fel d 4.[3]

Fel d 1

Fel d 1 is the most dominant cat allergen. It is part of the secretoglobulin family, which are proteins found only in mammals. Fel d 1 is primarily secreted through the sebaceous glands and can be found on the skin and fur of a cat.

What allergy can cause swollen lips

It is less commonly secreted through the salivary gland, lacrimal glands, skin and anal glands.[4]

Fel d 4 and Fel d 7

Fel d 4 and Fel d 7 are cat lipocalins. Fel d 4 and Fel d 7 are one of the most common cat allergens after Fel d 1. Fel d 4 is primarily found in cats’ saliva and is associated with atopic dermatitis in children with cat allergies.[4]

4 Causes for Swollen Lips


Swollen lipsthat are the result of allergies is a condition known as allergic angiodema.

When your body comes in contact with allergens, it causes a histamine result in your body that causes fluid to build up underneath skin layers. According to theMayo Clinic, allergic angiodema is most common with food allergies. Of course, you may not even realize you own a food allergy until you bite into the offending ingredients and experience the swelling in the lips, mouth and throat. For mild allergic reactions, an over-the-counter medicine, such as Benadryl, can assist reduce your body’s response to antihistamines. If you’re at risk for swelling in the throat that cuts off your airways (anaphylaxis), use your prescribed epinephrine auto-injector or seek medical attention immediately.


When your body is fighting aninfection, your skin can become inflamed and irritated.

This is especially true for the delicate skin on your lips and around your mouth. If you’ve had a cut on your lips and you’re starting to see it become inflamed, swollen, boiling to the touch and painful, it could be the result of an infection. Infections happen when healing wounds and blisters become infiltrated with harmful bacteria, hindering the healing process, and sometimes causing severe issues.

This could be from your hands or the result of some of the bacteria in your mouth, according to theAmerican Dental Association. The first step to warding off infections is to leave healing cuts alone; never pick at them or pop blisters, which transfers bacteria from your hand to the wound. If you do suspect an infection, see your doctor for antibiotic ointments or medication to stop the infection and promote better healing.


It’s true that one of the more commoncauses of swollen lips is traumadirectly to the mouth.

What allergy can cause swollen lips

The skin on your lips is extremely thin, and when your mouth is hit with enough force, blood rushes to the area and causes that swollen appearance. Sometimes, this trauma only causes swelling, but other contact can result in broken skin, and because of a high quantity of blood flow in the area, this can result in what seems love an alarming quantity of bleeding. Luckily, theUniversity of Rochester Medical Centernotes that most cuts and bruises to the mouth area can be cared for at home. First, examine the area for broken skin. If it’s just a swollen lip, apply ice to assist reduce swelling.

What allergy can cause swollen lips

If the skin is broken, wash your hands and apply a clean, freezing compress to stop the bleeding. See your doctor if the bleeding doesn’t stop in 5 to 10 minutes or if the cuts are longer than one-half inch, were caused by a bite, or own debris inside.

Chemical Reaction

Certain caustic chemicals found in things such as cleaning products can cause burns and wounds, especially on yoursensitive lip skin. This can result in blistering, swelling and general discomfort.

What allergy can cause swollen lips

If skin is only red and swollen, apply a freezing compress. If skin breaks or develops blisters, however, seek medical attention. This is a sign of a third-degree burn and requires medical attention and often antibiotic ointment to heal.

Swollen lip causes aren’t always as cut-and-dried as they appear. Because lip skin is so thin and sensitive, any number of issues could result in that telltale puffy, uncomfortable feeling. Still, as endless as you care for the cause properly, swelling in the lips should be a short-term issue.

As always, remember to maintain your oral health with theColgate Entire Toothpaste and Pro-Shield Mouthwash, which prevent plaque, gingivitis and tartar build-up.

Angioedema is swelling underneath the skin.

It’s usually a reaction to a trigger, such as a medicine or something you’re allergic to.

It is not normally serious, but it can be a recurring problem for some people and can very occasionally be life-threatening if it affects breathing.

Treatment can generally assist keep the swelling under control.

Symptoms of angioedema

The swelling most often affects the:

  1. feet
  2. lips and tongue
  3. area around the eyes
  4. hands
  5. genitals

Many people also own a raised, itchy rash called urticaria (hives).

In more serious cases, angioedema can also cause breathing difficulties, tummy (abdominal) pain and dizziness.

Read more about the symptoms of angioedema.

Treatments for angioedema

The swelling will generally get better by itself in a few days, but there are treatments that can assist it settle faster and reduce the risk of it happening again.

The treatments recommended depend on the type of angioedema you own. For example:

  1. allergic and idiopathic angioedema are generally treated with antihistamines or, occasionally, steroid medicine to reduce the swelling
  2. drug-induced angioedema will generally resolve if you change to a diverse medicine – your doctor will advise you about this
  3. hereditary angioedema cannot be cured, but medicines can assist prevent swelling and quickly treat swelling when it occurs

Angioedema can generally be treated at home, although treatment in hospital may be necessary in serious cases.

Read more about how angioedema is treated.

Sheet final reviewed: 28 August 2019
Next review due: 28 August 2022

The swelling of the lips is a condition characterized by increased volume of this specific part of the body.

May be due to an excessive accumulation of fluid (edema) or inflammation and can originate from diverse causes.

There are various medical conditions that may be associated with swelling of the lips, ranging from allergy (food, by contact, drug), the presence of herpes simplex, to heart failure or kidney failure (in this case the swelling of the lips is a result of a generalized edema), but also insect bites, sunburn and trauma can cause swelling of the lips.

The swelling of the lips may be accompanied by a feeling of reduction of sensitivity and / or itching, and the swollen part can be painful and warm.

In case of allergic reaction, the swelling of the lips can be a symptom of anaphylaxis (very intense allergic reaction and dangerous due to hypersensitivity to a substance), in this case even nausea, vomiting, itching, rapid heart rate and difficulty breathing can occur.

What helpful of diseases can be associated with swollen lips?

The following diseases may be associated with swollen lips:

  1. Herpes simplex
  2. Kidney failure
  3. Sunburns
  4. Acromegaly
  5. Heart failure
  6. Contact allergy
  7. Insect bites
  8. Food allergy
  9. Allergy medications
  10. Trauma

Remember that this is not an exhaustive list and it is highly recommended to consult your doctor, in case of symptom’s persistence

What is the therapy for swollen lips?

Since the origin of the swollen lips can be extremely diverse diseases, each of which is characterized by diverse treatment approaches, to prepare an adequate treatment, it is necessary to identify the medical condition that is the basis of manifestation of this disorder.

It is therefore extremely significant to consult your doctor.

When is most likely to contact your doctor in case of swollen lips?

In case of severe trauma and in already diagnosed diseases (see list of associated diseases).

Allergies to cats are one of the most common allergies among individuals. Among the eight known cat allergens, the most prominent allergen is secretoglobinFel d 1, and it is produced in the anal glands, salivary glands, and, mainly, in sebaceous glands of cats, and is ubiquitous in the United States, even in households without cats.[1] Allergic symptoms associated with cats include coughing, wheezing, chest tightening, itching, nasal congestion, rash, watering eyes, sneezing, chapped lips, and similar symptoms.

In worst case scenarios, allergies to cats can develop into more life-threatening conditions such as rhinitis and mild to severe forms of asthma.[1] Despite these symptoms, there are numerous types of solutions to mitigate the allergic effects of cats, including medications, vaccines, and home remedies. Hypoallergenic cats are another solution for individuals who desire to pets without the allergic consequences. Furthermore, prospective pet owners can reduce allergic reactions by selecting cats of a specific gender or color, which are associated with a lower production of allergens.

When to get medical advice

See your GP if you own episodes of swelling that affect your skin or lips and you’re not certain of the cause.

You may need to own some tests to determine the cause. Read more about tests for angioedema.

Dial 999 for an ambulance if you, or someone with you, has swelling and:

  1. sudden or worsening breathing problems 
  2. feels faint or dizzy
  3. passes out or collapses 

These are signs of a serious allergic reaction (anaphylaxis).

If you, or the person who’s ill, own been prescribed an adrenaline auto-injector for this, use it while waiting for the ambulance to arrive.