What triggers urticaria at night and why are hives and itching at their worst?
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.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What triggers urticaria at night and why are hives and itching at their worst?
### Input: 
### Response: 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.