Allergic urticaria is not contagious.
Infectious diseases are diseases caused by pathogenic microorganisms (such as viruses, bacteria, fungi, chlamydia, rickettsiae, mycoplasma, prions and parasites, such as protozoa and worms) that infect the human body and have a certain degree of contagiousness, which may result in epidemics.
Urticaria is the skin mucous membrane due to temporary vascular permeability increase caused by limited edema, that is, hives, belongs to the allergic diseases, will not be transmitted from person to person, usually not infectious.
When the cause of urticaria is related to some pathogenic microorganisms, it may cause the related pathogens to spread from person to person, but depending on the individual’s constitution, some people infected with related pathogenic microorganisms may not necessarily cause urticaria.
Urticaria patients should promptly go to the regular hospital, follow the doctor’s instructions for standardized treatment.