Izvestia: dermatologists called false frostbite of the fingers a new symptom of COVID-19 
Almost every fifth patient infected with COVID-19 skin signs of the disease are observed. In particular, a new symptom was recorded in the sick – “covid fingers”, in which the tips of the fingers and toes turn red, as with frostbite, Izvestia reports.
Signs of “covid fingers”
Dermatologists called “covid fingers” false frostbite of the fingers. With this symptom, the patient's tips of fingers and toes turn red and swell, they are also covered with vesicles and abscesses. The picture as a whole resembles a state of frostbite, but does not bring discomfort to people, doctors warned Russians.
20 percent of COVID-19 patients face skin symptoms of the disease
Doctors say that “covid fingers” are included in the group of angiitis. These are diseases arising from immunopathological inflammation of blood vessels – arteries, arterioles, capillaries and veins. The most common sign of such manifestations is inflammation of the walls of the dermal and hypodermal blood vessels.
In appearance, this pathology looks like frostbite or trauma, although patients deny such damage
GBUZ” MNPTSDK DZM “
Experts from the Moscow Scientific and Practical Center for Dermatovenereology and Cosmetology (GBUZ MNPTSDK DZM) and doctors of the city clinical hospital No. 40 in Kommunarka, including its chief physician Denis Protsenko, included the information received about the new symptom of coronavirus in the article “Lesions of the skin and its appendages with COVID-19 “, published in the journal” Moscow Medicine “.
Reasons for the appearance of” covid fingers “
Maria Petina, head of the Center for Diagnosis of Disorders in Patients After COVID-19, said that “covid fingers” most often occur in children and adolescents, but they also occur in adults. In her opinion, the symptom occurs for two reasons: due to the reaction of the immune system and dysfunction of the endothelium – the cells responsible for creating the inner lining of blood vessels.
The medic explained that the human immune system reacts to infection in such a way that the antiviral protein type I interferon and the antibody mistakenly attack not only COVID-19, but also skin cells. At the same time, endothelial cells form a barrier between blood and tissues, as well as synthesize and secrete a significant amount of biologically active substances.
According to Petina, it is endothelial dysfunction that explains the frequency of thrombosis and the high risk of complications for patients with cardiovascular vascular pathology and high cholesterol levels. Therefore, false frostbite signals that a person has serious malfunctions in the body.
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Tatiana Sulima, dermatologist, trichologist at the NAKFF Oncology Clinic, added that skin rashes may be a sign of an early form of coronavirus, when the patient does not yet know about his illness. This was previously stated in Rospotrebnadzor. Rashes appear anywhere on the body – on the abdomen, chest, back, limbs, face, mouth and nasopharynx.
In addition, with COVID-19, another problem has become more frequent – thinning and hair loss on the scalp. In general, doctors rarely diagnose the skin symptoms of coronavirus. The most common consequences of the disease remain neurological complications, said in an interview with “Lenta.ru” physician, clinical pharmacologist Andrei Kondrakhin. fingers. They can change color near the nail plate – a similar symptom occurs when examining the hands. “In practice, there were several such patients who had acne on their heads, but were not fixed anywhere else,” she concluded.
Head of the Department of Skin and Venereal Diseases named after V.A. Rakhmanov of the Sechenov University Olga Olisova said that the coronavirus often provokes the development of skin diseases.
We are faced with chronic diseases (psoriasis, atopic dermatitis, pemphigus, eczema and others), some of which, after suffering COVID-19, are exacerbated and are very difficult. In addition, skin diseases often make their debut after this infection
Olga Olisova Doctor, Professor, Doctor of Medical Sciences
Doctors note that the rashes that appear with COVID-19 need to be systematized. However, they often proceed as angiitis. Sometimes it is difficult to verify them, so doctors describe them as “macular, papular rashes” or characterize them by the type of frostbite of the extremities.
Earlier, dermatologist Stanislav Arkannikov revealed the effects of coronavirus on the skin. He noted that she is a “mirror of the body.” According to Arkannikov, the skin suffers greatly from COVID-19.