In this section
Hives are slightly raised, red patches of skin called wheals (or welts). They occur in groups on any part of the body, and can look like mosquito bites. They are often itchy, but sometimes also sting. The medical word for hives is urticaria (er-tuh-care-ia).
Hives can be a sign of an allergic reaction to things like food or an insect sting. Hives are very common – one out of every five people will have hives at some time in their life. It is common for hives to occur in children where there is no identifiable cause, this is called idiopathic urticaria.
Treatment includes medicines and avoiding known triggers. The triggers may be different for each child, and it is common that a trigger cannot be identified.
If your child has hives, they may have raised round wheals that look like mosquito bites. The wheals are red on the outside and can be white in the middle.
Hives can look or feel unpleasant, but usually they are harmless.
Sometimes children have a more serious allergic reaction known as anaphylaxis. Symptoms of anaphylaxis include:
Call an ambulance immediately if your child has symptoms of anaphylaxis.
If your child has experienced anaphylactic reactions in the past, you may be advised to have an adrenaline autoinjector (e.g. an EpiPen) with you at all times. Your child could also wear a medical alert pendant or bracelet to let other people know what may cause them to have an allergic
reaction. Discuss this with your GP.
Hives only, without other features described above, is not anaphylaxis.
Hives are a skin rash which can be caused by an allergic reaction, when the immune system responds to a substance such as a food or insect venom. Hives in this case commonly last for a few hours once the trigger has been removed. Hives can commonly occur without a trigger, and may be the immune system responding to a viral illness/cold. These hives commonly come and go for a few days to weeks. Hives occur when a chemical called histamine is released.
If hives are present for over a few days with no obvious cause, allergy tests are not needed, in these cases there is generally no external trigger and the hives with gradually improve with time. Sometimes these cases may also have associated swelling of the lips/eyes.
If hives appear soon after a certain food, medicine or insect sting, and resolve within a few hours after no further exposure to this trigger, then allergy testing may be indicated.
Most of the time, hives as the only symptom can be safely managed at home, without the need to see a doctor. A pharmacist might provide you with some non drowsy antihistamine medication for relief of symptoms during an episode. These are safe to use from six months of age and can be used once or twice daily if needed. The best treatment for hives is to avoid the cause or trigger, however this is not
You can help treat your child’s hives by:
If your child continues to have hives for more than six weeks, take them to see your GP.
Treatment for severe or frequent hives may include:
If at any time the hives are associated with other symptoms (high fever, bruising, purple skin discolouration or joint pains), your child should be seen by a doctor.
If your child presents signs of anaphylaxis, then call an ambulance.
How effective are antihistamine medications?
Antihistamine medication won't treat existing hives, but it will prevent hives from getting worse and prevent new hives from erupting. If your child is exposed to a known trigger, it is best to give them antihistamine medication as soon as you can.
Are there any creams I can put on my child's hives to stop
Talk to your pharmacist about creams and lotions that may help reduce the intensity of the itching. The most effective creams will include antihistamine.
Should I take my child to see an allergy specialist to find
out the cause of his hives?
If you are unable to determine the trigger, it is useful to keep a food and activity diary. An allergy specialist can also perform further testing to determine the most likely triggers for your child's hives.
Developed by The Royal Children's Hospital General Medicine and Dermatology departments. We acknowledge the input of RCH consumers and carers.
Reviewed October 2021.
Kids Health Info is supported by The Royal Children’s Hospital Foundation. To donate, visit
This information is intended to support, not replace, discussion with your doctor or healthcare professionals. The authors of these consumer health information handouts have made a considerable effort to ensure the information is accurate, up to date and easy to understand. The Royal Children's Hospital Melbourne accepts no responsibility for any inaccuracies, information perceived as misleading, or the success of any treatment regimen detailed in these handouts. Information contained in the handouts is updated regularly and therefore you should always check you are referring to the most recent version of the handout. The onus is on you, the user, to ensure that you have downloaded the most up-to-date version of a consumer health information handout.