The most common causes of bruising are a lack of routine and vitamin C . With their deficiency, the strength of the vessels decreases and bruises can occur in some places. For example, a lack of routine leads to a disruption in collagen production, respectively, the vessels become more fragile, their permeability increases: normal compression of the hand can lead to bruising.
The tendency to subcutaneous hemorrhage in girls may be associated with the use of hormonal contraceptives.
Another reason is lack of vitamin K .
Without it, blood coagulation processes worsen.
Less commonly, bruising is associated with disease. For example, with hemorrhagic vasculitis , the body begins to produce antibodies to its own vessels, as a result of which the walls of the vessels are destroyed. Small hemorrhages may occur both in the limbs and in the area of the internal organs. A provocateur can be a chronic infection or prolonged use of antibiotics.
There are diseases that are associated with dysfunction of platelets - the cells responsible for blood coagulation. The reason is either their lack or disruption of their work.
In addition, the patient may have a deficiency of some coagulation factors, such as, for example, with hemophilia . However, such diseases are characterized by large hemorrhages (for example, in joints), and they are usually detected even in childhood.
Randu-Osler disease may be involved in the formation of bruises.
This is a violation of the structure of the choroid, as a result of which small blood spots similar to asterisks can form under the skin. These stars can be a symptom of varicose veins .
Sometimes bruises are a symptom of oncological disease (e.g. leukemia) and hormonal disruption .
Bruising can result from regular use of steroid drugs , which are used to treat autoimmune diseases.
More hematomas can occur with rheumatism, kidney and blood diseases .