If you have urticaria, you can consult a dermatologist for examination. If the hospital has more specialized departments, you can also choose the allergy department. Dermatology is a common department for treating this type of problem, and the doctor will provide appropriate diagnosis and treatment recommendations based on your situation.

Specifically, you can choose as follows:

1. Most general hospitals' dermatology departments can diagnose and treat urticaria. Doctors will examine the characteristics of the rash and inquire about related triggers.
2. Some hospitals have a dedicated allergy department. If you suspect that your allergy is related to food, pollen, or other allergens, or if you experience recurrent allergies, this department may be more suitable.
3. If the attack is accompanied by palpitations, difficulty breathing, or other discomfort, you can go to the emergency department for emergency treatment first.
Before seeking medical attention, it is recommended to observe the timing and morphological changes of the rash, as well as whether it is related to factors such as diet and environment. This information can help the doctor make a better diagnosis. Also, avoid scratching or using unverified ointments, as this may worsen the symptoms.