What is the reason why there are often purple patches on the skin?

A normal person's skin should be light yellow with a hint of red, but some people will find purple patches on their skin, and they are more common in some local areas. This symptom can be considered as purpura, which is mainly caused by blood stasis under the surface of the skin, forming bruises. This disease is mostly related to blood and skin. It is usually more common in adolescence and requires timely examination and treatment.

Purple patches that often appear on the skin are called purpura.

Purpura is a disease name in Traditional Chinese Medicine. Also known as purpura, it is characterized by blood overflowing under the skin and mucous membranes, resulting in the appearance of petechiae and ecchymoses that do not fade when pressed. It is one of the common hemorrhagic diseases in children.

It is often accompanied by nosebleeds, bleeding from the teeth, and even vomiting blood, blood in the stool, and blood in the urine. This disease belongs to the category of blood syndrome. The diseases and syndromes recorded in ancient Chinese medical books such as "grape plague", "muscle bleeding" and "spot poison" have similarities with this disease. This disease includes allergic purpura and thrombocytopenic purpura in Western medicine.

The age of onset of Henoch-Schönlein purpura is mostly 3-14 years old, especially school-age children, more common in males than in females, and more common in spring.

The age of onset of thrombocytopenic purpura is mostly 2-5 years old, with no difference in the incidence between boys and girls. The mortality rate is about 1%, and the main cause of death is intracranial hemorrhage.