system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What triggers urticaria at night and why are hives and itching at their worst?


assistant
Getting hives at night could mean that you have come into contact that triggers the allergic reaction. It could very well be something you ate or the fabric of your sheets or your current environment. One must avoid triggers and use anti-itch medicine without prescription to alleviate the problem.