Eating oysters causes hives, mainly belongs to the food allergic reaction, usually need to take general treatment, medication and other ways. 1. General treatment: eating oysters lead to hives is an acute urticaria, the first need to stay away from allergens, to avoid contact with oysters again. Secondly, do not scratch the skin lesions, bath water temperature should not be too high, daily to loose, wear cotton clothing. 2. Medication: patients need to follow the doctor’s instructions to take antihistamines, such as loratadine, cetirizine, severe cases need to systematically use prednisone, dexamethasone and other drugs. In addition, if there are itching symptoms, you can use glycerine lotion to improve the symptoms. Eating oysters lead to hives, patients need to go to the hospital in time, under the guidance of the doctor to use the above medication, not private treatment, so as not to lead to adverse consequences.