At night, urticaria is generally associated with vagal excitation, reduction of external environmental disturbances, increase of allergic factors, temperature changes and weakening of body functions at night.
1. Vagal excitation: at night, vagal excitation mainly occurs at night, which will lead to urticaria patients in the night self-conscious itchy symptoms, scratching rash, while the daytime itchy symptoms are mild.
2. Decrease of external environmental interference factors: at night the external interference becomes less, people are sensitive to their own changes, resulting in increased sensitivity.
3. The increase of allergic factors: when urticaria patients sleep at night, they will come into contact with pillows, quilts and other supplies, which often come with some debris, which can easily harbor bacteria, mites and their metabolites, which can easily induce or aggravate the symptoms.
4. Temperature changes: clinically some types of urticaria in the temperature from cold to hot or from hot to cold and lead to recurrence, such as heat urticaria.
It is recommended to get hives at night and seek medical advice, take medication regularly under the guidance of a doctor, and avoid possible triggers at the same time.