Urticaria and Angioedema.

Urticaria and angioedema are common allergic skin conditions that can significantly affect quality of life. While they are often seen together, they involve different layers of the skin and present with distinct symptoms. Early recognition and appropriate treatment under the guidance of a dermatologist or allergy specialist are essential for effective control.

What Is Urticaria (Hives)?

Urticaria, commonly known as hives, is a condition characterized by sudden onset of itchy, red or skin-colored raised wheals on the skin. These lesions may vary in size, shape, and location and usually resolve within 24 hours without leaving marks.

Urticaria occurs due to the release of histamine and other inflammatory mediators from mast cells in the skin.

Common Features of Urticaria

  • Intense itching or burning sensation
  • Raised, well-defined wheals
  • Lesions that appear and disappear within hours
  • Worsening with scratching or pressure

What Is Angioedema?

Angioedema is a deeper form of swelling that affects the lower layers of the skin and mucous membranes. It commonly involves the lips, eyelids, face, tongue, hands, feet, or genital area. Unlike urticaria, angioedema is usually painful or tight rather than itchy.

In severe cases, swelling of the tongue or throat can cause breathing difficulty and requires emergency medical attention.

Common Features of Angioedema
  • Deep swelling without surface redness
  • Tightness, pain, or burning sensation
  • Swelling lasting 24–72 hours
  • May occur with or without hives

Common Triggers of Urticaria and Angioedema:

  • Foods such as nuts, shellfish, eggs, and food additives.
  • Medications including NSAIDs, antibiotics, and ACE inhibitors.
  • Viral or bacterial infections.
  • Physical factors such as heat, cold, pressure, sweating, or sunlight.
  • Stress and emotional factors.
  • Autoimmune conditions.

Who Is at Risk?

  • Individuals with a personal or family history of allergies.
  • People under chronic stress.
  • Those with recurrent infections.
  • Individuals taking certain long-term medications.

Diagnosis:

Diagnosis is primarily clinical and based on history and examination. In chronic or recurrent cases, your dermatologist may recommend:

  • Blood tests.
  • Allergy testing.
  • Autoimmune screening.
  • Thyroid function tests.

Treatment Options:

Antihistamines:

Second-generation non-sedating antihistamines are the first-line treatment for both urticaria and angioedema.

Additional Therapies,
  • Increased antihistamine dosing under medical supervision.
  • Short-term corticosteroids for severe flares.
  • Leukotriene receptor antagonists.
  • Biologic therapy such as omalizumab for chronic refractory cases.
Emergency Treatment,

Severe angioedema involving the airway requires immediate medical care and may need injectable adrenaline.

Lifestyle Measures and Prevention:

  • Identify and avoid known triggers.
  • Avoid unnecessary medications.
  • Manage stress and ensure adequate sleep.
  • Avoid tight clothing and excessive heat.
  • Maintain a symptom diary in chronic cases.

Key Takeaway:

Urticaria and angioedema are common but manageable conditions. With proper diagnosis, trigger identification, and evidence-based treatment, most patients can achieve excellent symptom control and lead a normal life.

Scientific References

  1. Zuberbier T et al. The EAACI/GA²LEN/EDF/WAO guideline for the definition, classification, diagnosis, and management of urticaria. Allergy.
  2. Kaplan AP. Chronic spontaneous urticaria: Pathogenesis and treatment considerations. Allergy Asthma Immunol Res.
  3. Maurer M et al. Omalizumab for the treatment of chronic idiopathic urticaria. N Engl J Med..
  4. American Academy of Dermatology Association – Urticaria and Angioedema Clinical Guidelines.