For urticaria, it is recommended to first consult a dermatologist for examination. If the hospital has specialized departments or other symptoms are present, other relevant departments can be selected depending on the specific situation. The following are medical recommendations for different situations:

1. Dermatology is the first choice: Urticaria mainly manifests as wheals and itching on the skin. Dermatologists can directly diagnose common causes and prescribe anti-allergy medications to control symptoms.

2. Accompanied by fever or joint pain: If the rash is accompanied by fever and joint discomfort, you may consider consulting an immunology specialist to rule out whether it is related to the immune system.
3. Children: If a child suddenly develops urticaria, it is recommended to consult a pediatrician. The pediatrician will adjust the treatment plan according to the child's age.
4. Recurrent attacks or unknown causes: For long-term recurrent attacks, consult an allergy specialist to find potential triggers through allergen testing.
It is recommended to keep a record of the time and location of the rash, as well as any foods or environments the person may have come into contact with, and inform the doctor of these details when you visit them for treatment. Avoid self-medicating. If symptoms worsen or shortness of breath occurs, seek emergency medical attention immediately.