The skin is called the outer cover of the human body, which protects the body from various environmental influences. He also participates in respiration, in metabolic, thermoregulatory and other processes. The outer cover is represented by a massive receptive field with completely different types of surface sensitivity, the manifestation of which depends on the influence of pain, pressure, temperature. In many cases, human skin diseases arise due to the action of biological factors. These include viruses, microscopic fungi and animal parasites.
Warts are referred to as a benign neoplasm on the outer cover. They are a consequence of viral etiology. The causative agent of the neoplasm is transmitted through household items or in contact with the patient.
Vitiligo is a pigmentation disorder in the external integument. This disease is manifested by the disappearance of melanin in the skin areas.
Human skin diseases caused by viruses include a disease such as herpes. It is characterized by rashes on the mucous membranes and the outer cover in the form of grouped vesicles. Herpes, as a rule, accompanies ARVI, pneumonia, flu and other ailments.
Human skin diseases also include various types of lichen.
The development of shingles is caused by the chickenpox viral agent.
Trichophytosis (ringworm) is a contagious fungal infection of the hair, nails and skin.
Psoriasis (lichen scaly) refers to chronic diseases of the outer cover. The disease is not contagious, but difficult to treat. The development of this disease, which is hereditary, is associated with genetic disorders in the activity of the nervous and endocrine system and in metabolism.
Corn is a limited thickening of the cutaneous stratum corneum. Its occurrence is provoked by prolonged pressure or friction of the outer cover.
Human skin diseases can be inflammatory in nature. Such ailments include erysipelatous swelling, acne, boils.
Erysipelas is classified as acute inflammation. Its causative agent is streptococcus, invading through damage to the outer cover. Erysipelas may also be a complication of a purulent wound.
Skin diseases of adolescents in many cases are associated with increased function of the sebaceous glands and a change in the composition of their secretion. Acne familiar to many belongs to this category.
Boils are classified as purulent-necrotic inflammation in the hair sac and sebaceous gland surrounding it. This inflammation is provoked by pyogenic bacteria. The occurrence of boils occurs, as a rule, due to poor digestion, under the influence of loads carried out on a full stomach. Throughout the process of inflammation, careful hygiene is necessary. This will prevent the entry of an even larger infection into the site of inflammation.
Scabies is a disease transmitted by contact. Its causative agent is the scabies mite. This lesion of the outer cover is characterized by a long incubation period (about two weeks), during which the infected person does not suspect its presence.
Chronic and acute non-contagious disease of the outer cover is eczema. This ailment is allergic in nature and is accompanied by a rash, burning, itching. For eczema, a recurrent manifestation is characteristic.
Allergies of the outer cover belong to a separate group of diseases. A case history of skin diseases is of great importance when conducting research activities. In many cases, for example, with allergic contact dermatitis, testing is carried out on all potential pathogens.