Pressure purpura, also known as intravascular pressure-increasing purpura, is a mechanical purpura that is caused by increased pressure in the blood vessels, which the vessel walls cannot withstand and rupture and bleed, and is more common in the elderly and children.
Based on the medical history, the diagnosis can be confirmed if the patient may have violent coughing, vomiting, crying, convulsions and other breath-holding movements before the appearance of purpura, combined with the appearance of pinpoint-sized, clustered or scattered petechiae or petechiae on the skin, and normal blood count and coagulation tests.