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"I have a widespread hives that has been persisting for 3 days. I have used antihistamines without success. What should I do to relieve the itching?"

If over-the-counter antihistamines like Benadryl are not effective in relieving the itching from generalized hives, you can try using a different antihistamine such as Reactine. It may also be helpful to use a 1% hydrocortisone cream and a moisturizing cream. If these medications do not provide relief, it is advisable to consult a doctor for a more effective treatment.