How long does it take for hives to get better, first of all, it depends on what type of hives it is, whether it is acute hives or chronic hives. Among acute urticaria, whether it is caused by allergic factors, or caused by infectious factors, or caused by genetic factors, the onset time is different. If the acute urticaria is caused by allergy, just get rid of the allergens, and then use anti-allergy drugs, usually 1-3 days. If the hives are caused by drugs, it will take about 1 week. If it is caused by an infection, with the addition of anti-infective medication and anti-allergy medication, it is usually relieved in 3 days and completely better in about 1 week. If it is a parasitic infection, it will take a little longer. Chronic urticaria takes a long time to treat and a long time to get. Hereditary urticaria can only control the symptoms, basically can not be cured.