Why does measles attack at night?

Urticaria may occur 24 hours a day, but the proportion at night is higher. It may be related to the following aspects. For example, patients usually rest at home at night. If allergens exist at home, they are easy to attack at home. Plant pollen, pajamas, bedding, pets, etc. at home may be the source of allergens. Then, when sleeping at night, metabolism slows down, some hormone levels in the body decrease, and the inhibition of allergic mediators may be weakened, so it is easy to attack at night. In addition, the blood flow is slow at night, the nutrition on the skin surface is relatively insufficient, and the skin may be more sensitive at night, making urticaria easy to attack at night.