The body a scratch on the red blood spots like scrapes may be due to thrombocytopenic purpura, allergic purpura, artificial urticaria and other diseases.
1. Thrombocytopenic purpura: the disease may be genetic, immune, infection and other various reasons lead to the body platelet reduction, the skin has a tendency to bleed, so a scratch on the body may show the skin or mucous membranes appear bleeding spots, bruises and so on.
2. Allergic purpura: the cause of the disease is not known, may be related to infection, heredity, drugs and other factors, usually changes in vascular permeability, resulting in blood vessels are more susceptible to rupture, when stimulated by scratching, the skin may show petechiae, ecchymosis and so on.
3. Artificial urticaria: due to artificial scratching stimulation or external stimulation, caused by the skin, mucous membrane vasodilatation, increased permeability, causing localized edema of the skin, accompanied by itching sensation, which may lead to red patches on the body as soon as the body is scratched.
In addition to the above reasons, contact dermatitis, psoriasis, etc. may also cause a scratch on the body of the red blood spots like gua sha, if there is a case of red blood spots recommended timely medical care, under the guidance of the doctor to find out the cause of the disease, and comply with the doctor’s instructions for treatment.