​The most common cause of acute urticaria is viral infection. Urticaria may also appear due to food or drug allergy. It is rarely related to physical agents (cold, pressure, sweat or sunlight).

Chronic urticaria can occur in both children and adults. The cause cannot be identified in the majority of the cases. Rarely, it may occur when the body’s immune system is reacting against itself. Chronic urticaria usually resolves over time: in 6 months for most cases.

​Tests are usually not required. However, some children may require skin or blood tests if there is a suspicion of a trigger or an underlying illness.

Antihistamines are the treatment of choice for urticaria and are used to relieve the itch.

Non-sedating antihistamines are first-line medicines and can decrease the number of urticarial lesions, the frequency of flare ups and diminish itchiness. Sedating antihistamines can also be used. However, they can cause sleepiness and loss of alertness. They are useful at bedtime especially when combined with a non-sedating antihistamine during the day.

Prednisolone (steroids) are usually not indicated.

Please consult a doctor for a proper diagnosis before administering medication.

​Bring your child to see a doctor immediately if:

• The urticaria is painful or does not fade.
  
• The urticaria is associated with swelling of the throat or difficulty in breathing.
  
• There is a loss of consciousness.
  
• You suspect a specific trigger and want to perform tests to confirm it.