Is purpura contagious, and how is it transmitted?
Disease description:
A classmate of my child has developed purpura, and my child often plays with him. I would like to ask whether purpura is contagious. If it is contagious, how is it generally transmitted?
Doctor's answer (1)
Dr. Liu Wenmin
In general, purpura is mainly divided into two categories: allergic purpura and thrombocytopenic purpura. Allergic purpura is usually not contagious, while thrombocytopenic purpura has a certain degree of transmissibility.
Purpura is a condition characterized by subcutaneous and mucosal bleeding caused by abnormalities in blood vessel wall structure and function, coagulation function, platelet number or function, as well as certain hereditary or immune diseases. Allergic purpura occurs when the body develops an allergic reaction to certain substances, such as pollen, foods, or medications, leading to immune dysfunction. This type of purpura is unrelated to pathogen transmission and thus is not contagious.
Thrombocytopenic purpura may be caused by genetic factors, bone marrow failure, or other factors leading to reduced platelet count or impaired platelet function, resulting in subcutaneous or mucosal bleeding. Thrombocytopenic purpura may be transmitted through blood contact, although its transmissibility is relatively low.
In daily life, it is important to maintain good personal hygiene habits and avoid close contact with affected individuals to reduce the risk of infection.
