Hives

Hives, or urticaria, are raised, itchy, red or skin-colored welts that appear suddenly on the skin and can vary in size and shape. They often appear and disappear within hours in one area while new ones form elsewhere, typically as part of an allergic or immune response. The most common causes include: Allergic reactions to food; medication; or insect stings; viral infections.

Hives becomes an emergency when it is unusually severe, sudden in onset, accompanied by other serious symptoms (chest pain, difficulty breathing, fainting), or occurs in vulnerable individuals such as infants, the elderly, or people with serious chronic conditions.

Diagnosis of Hives begins with a detailed medical history and physical examination of the skin. Your doctor may order blood tests, urine analysis, imaging studies (X-ray, ultrasound, MRI), or refer you to a specialist depending on suspected causes. Early diagnosis leads to faster, more effective treatment.

Mild cases of Hives can often be managed with self-care: Apply a cool compress to itchy areas; avoid known triggers; and wear loose. However, if symptoms are severe, persistent, or worsening, always seek medical attention rather than relying solely on home remedies.

Hives is typically classified as sudden onset. Acute forms usually resolve within a few days to weeks with appropriate care. Chronic or recurrent hives may persist for months and requires longer-term management by a healthcare professional.

You should see a doctor if: Seek emergency care immediately if hives are accompanied by swelling of the lips; tongue; or throat. Early evaluation by a healthcare professional ensures an accurate diagnosis and prevents complications.