Hives also called urticaria frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food. Psychological stress, cold temperature, or vibration may also be a trigger.In half of cases the cause remains unknown.Risk factors include having conditions such as hay fever or asthma.Diagnosis is typically based on the appearance. Patch testing may be useful to determine the allergy.
Prevention is by avoiding whatever it is that causes the condition. Keeping the environmental tempreture cool.
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Answered2018-06-29 14:17:37
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