Read More About Angioedema Symptoms and Common Triggers

Angioedema is a condition that causes sudden swelling beneath the skin or mucous membranes, often affecting the face, lips, tongue, throat, hands, or feet. Episodes may be triggered by allergic reactions, medications, inherited conditions, infections, or other underlying factors. While some cases resolve with minimal treatment, swelling involving the airway can become life-threatening and requires immediate medical attention.

Symptoms can vary depending on the cause and severity of the condition.

Common signs include:

  • Swelling of the lips.
  • Swelling around the eyes.
  • Swollen tongue.
  • Facial swelling.
  • Swelling of the hands or feet.
  • Tightness or discomfort in affected areas.
  • Abdominal pain in some individuals.

Symptoms may develop rapidly and last from several hours to a few days.

Common Triggers of Angioedema

Several factors may trigger an episode of angioedema.

Common triggers include:

  • Food allergies.
  • Certain medications, including ACE inhibitors.
  • Insect stings or bites.
  • Latex exposure.
  • Viral or bacterial infections.
  • Physical stress or injury.
  • Unknown (idiopathic) causes.

Some people experience repeated episodes without a clearly identified trigger.

Risk Factors

Certain individuals may have a greater likelihood of developing angioedema.

Possible risk factors include:

  • Family history of hereditary angioedema.
  • Previous allergic reactions.
  • Use of ACE inhibitor medications.
  • Asthma or allergic conditions.
  • Autoimmune disorders.
  • Recent infections.
  • Exposure to known allergens.

Understanding these risk factors may help guide evaluation and treatment.

How Angioedema Is Diagnosed

Healthcare providers diagnose angioedema using medical history, symptoms, and appropriate testing.

Diagnostic methods may include:

  • Physical examination.
  • Review of medical history.
  • Allergy testing.
  • Blood tests.
  • Complement protein testing.
  • Medication review.
  • Family history assessment.

Additional evaluation may be recommended for recurrent or hereditary cases.

Treatment and Management

Treatment depends on the underlying cause and the severity of swelling.

Management options may include:

  • Antihistamines.
  • Corticosteroids.
  • Epinephrine for severe allergic reactions.
  • Medications for hereditary angioedema.
  • Avoiding known triggers.
  • Monitoring recurrent episodes.
  • Emergency airway treatment when needed.

A healthcare professional can recommend the most appropriate treatment plan.

When to Seek Emergency Care

Some symptoms require immediate medical attention.

Seek emergency care if you experience:

  • Difficulty breathing.
  • Trouble swallowing.
  • Rapid swelling of the tongue or throat.
  • Severe hoarseness.
  • Fainting or loss of consciousness.
  • Signs of anaphylaxis.
  • Severe facial swelling affecting the airway.

Prompt treatment is essential when breathing or swallowing is affected.

Angioedema is a condition that causes sudden swelling beneath the skin and may result from allergies, medications, inherited disorders, infections, or unknown causes. Recognizing common symptoms and understanding potential triggers can help individuals seek timely evaluation and treatment. Because swelling involving the airway can become life-threatening, emergency medical care should be sought immediately if breathing or swallowing becomes difficult. This article is intended for informational purposes only and should not replace professional medical advice, diagnosis, or treatment.