Swellings, known as wheals, appear as a rash on the skin. They are usually pink or red, with an oval or round shape. They can range from a few millimeters to several inches across.
They can be extremely itchy, and they have a red flare around them. The wheals usually occur in batches, frequently on the face or the extremities, including the arms, hands, fingers, legs, feet, and toes. Welts normally disappear within 24 hours , but new ones may form.
They can appear on just one part of the body, or on several parts. Symptoms normally disappear within 24 hours, but sometimes another weal appears as the last one fades.
In some cases, hives can continue for several days. People with chronic hives can have symptoms for months or years. Anaphylaxis is a severe allergic reaction that can affect the whole body. It can lead to serious breathing difficulties and a loss of consciousness.
It can be fatal if not treated quickly. It is a medical emergency. People with hives need to be alert for further symptoms which could indicate an anaphylactic reaction. Triggers do not cause the problem, but they can aggravate symptoms, so patients should try to identify and avoid them.
Avoiding certain foods may help. Foods known to trigger histamine production include spinach, fish, yogurt, fish, tomato, processed, meats, chocolate, and strawberries. Some sources recommend supplements such as quercetin and evening primrose oil, and vitamin C, D and others.
It is important to speak to a doctor before using supplements, as these can trigger adverse reactions. One cause of hives , or a factor that can make symptoms worse, is emotional stress. A study in linked stressful life events, low family support, insomnia , and hives in 75 participants.
In other words, when a person is stressed, any inflammatory reactions are likely to be more severe in a person who is susceptible to a reaction. In this way, hives, or urticaria, can be linked to stress.
Acute urticaria is the most common type. Symptoms last less than 6 weeks, and they typically affect the face and neck, fingers, toes, and the genitals of males. However, any part of the body can be affected. Chronic urticaria continues for more than 6 weeks. During this time, the swelling, pain, and discomfort can be difficult to live with.
Women are twice as likely as men to develop CSU during their lifetime. Most women develop CSU when they are 20 to 40 years of age. If you have long-lasting or widespread hives, seeing a dermatologist can help you feel more comfortable. Seeing a dermatologist is also a good idea to make sure that what you have really is hives.
Find out how dermatologists diagnose and treat hives at: Hives: Diagnosis and treatment. Chronic hives: 10 ways to get relief. Cold urticaria: Welts on skin due to cold temperature could be hives.
Image 3. Image used with permission of the Journal of the American Academy of Dermatology. References Antia C, Baquerizo K, et al. Mosby Elsevier, China, Hide M, Takahagi S, et al. J Am Acad Dermatol. Rosman Y, Hershko AY, et al. Hives due to radiation therapy This medical treatment can be lifesaving but hard on your skin. Look at other rashes in babies and children. A pharmacist can give you advice about antihistamine tablets to help a hives rash. Tell the pharmacist if you have a long-term condition — you might not be able to take antihistamines.
You could be having a serious allergic reaction anaphylaxis and may need immediate treatment in hospital. A GP may prescribe menthol cream, stronger antihistamines or steroid tablets. If hives does not go away with treatment, you may be referred to a skin specialist dermatologist.
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