Hives (Chronic Urticaria) - Symptoms

Authored by Dr Mary Harding, 30 Dec 2016

Patient is a certified member of
The Information Standard

Reviewed by:
Dr Helen Huins, 30 Dec 2016

When you have hives (urticaria), you have an itchy rash caused by tiny amounts of fluid that leak from blood vessels just under the skin surface.

Hives can be acute (meaning the rash comes on suddenly and lasts less than six weeks) or chronic (meaning the rash hangs about, on and off, for longer.) This leaflet deals only with hives when they are chronic.

See separate leaflet called Hives (Acute Urticaria) for more information about the other type of hives.

An itchy rash is the main symptom of hives (urticaria). The rash can affect any area of skin. Small raised areas called weals develop on the skin. The weals look like mild blisters and are itchy. Each weal is white or red and is usually surrounded by a small red area of skin which is called a flare. The weals are commonly 1-2 cm across but can vary in size. There may be just a few but sometimes many develop over various parts of the body. Sometimes weals that are next to each other join together to form larger ones. The weals can be any shape but are often round.

Urticaria

As a weal fades, the surrounding flare remains for a while. This makes the affected area of skin look blotchy and red. The blotches then fade gradually and the skin returns to normal. Each weal usually lasts less than 24 hours. However, as some fade away, others may appear. It can then seem as if the rash is moving around the body. The rash may clear completely only to return a few hours or days later.

  • The appearance of the rash and the itch can cause distress.
  • A related condition called angio-oedema occurs from time to time in some people with persistent hives (chronic urticaria). In this condition some fluid also leaks into deeper tissues under the skin, which causes the tissues to swell:
    • The swelling of angio-oedema can occur anywhere in the body but most commonly affects the eyelids, lips and genitals.
    • Sometimes the tongue and throat are affected and become swollen. The swelling sometimes becomes bad enough to cause difficulty breathing.
    • Symptoms of angio-oedema tend to last longer than urticarial weals. It may take up to three days for the swollen areas to subside and go.
  • A variation called vasculitic hives occurs in a small number of cases. In this condition the weals last for more than 24 hours, they are often painful, may become dark red and may leave a red mark on the skin when the weal goes. Technically, this type of rash is not urticaria.

The rash is usually itchy. Each weal usually lasts less than 24 hours. However, as the rash may constantly come and go, the ongoing itch may cause distress and difficulty sleeping. If there is angio-oedema as well, it can be more serious, as it can cause serious breathing difficulties.

Further reading and references

In the last 20+ years (since August 1991) I had hives off all kinds of intensity and in the last 10 years or so I don't remember a day when I didn't have any on my skin.I have done so many things:...

steve76063
Health Tools

Feeling unwell?

Assess your symptoms online with our free symptom checker.

Start symptom checker
Listen