Sudden onset of urticaria is usually related to contact with certain triggering factors. It is recommended to first check for common causes in daily life and record the occurrence of the attack for reference when seeking medical treatment.
Specific possible reasons include:
1. Food or drug effects: Some people may experience reactions after eating seafood, nuts, or certain fruits; some medications may also cause similar symptoms, but not everyone will experience them.
2. Environmental factors: Common substances such as pollen, dust mites, and pet hair, or physical stimuli such as temperature changes, sun exposure, and friction can all be triggers.
3. Infection or physical condition: During an infection such as a cold, or when fatigued or stressed, the body's sensitivity may temporarily increase, making it more susceptible to flare-ups.
4. Other potential factors: In rare cases, certain chronic health conditions may also be associated with it, which requires further assessment by a physician.
If symptoms appear, first avoid suspected triggers and apply a cool compress to relieve itching. If the rash recurs or is accompanied by breathing difficulties, seek medical attention promptly for examination, so that a doctor can help determine the specific cause and guide treatment. Regularly recording changes in diet and environment can help identify patterns.
