Acute inflammation of the lymphatic vessels. It is a secondary disease, i.e. develops in the presence of a purulent focus in the body. From it, the causative agents of infection and their toxins, being absorbed and penetrating the lymphatic pathways, initially affect small lymphatic vessels. In this phase of lymphangitis, intense redness of the skin is observed, very similar to the face, differing from it by the absence of sharp boundaries.
When the inflammatory process moves to larger trunks, the skin becomes visible, passing through the entire limb to the armpit or inguinal fold, red stripes, painful and dense when felt.
The process extends to the care of either superficial lymphatic vessels (lymphangitis of the superficial vessels) or deep (lymphangitis of the deep vessels). Sometimes both are affected at the same time (mixed form), which is characterized by the appearance of swelling, pain and damage to the lymph nodes (lymphadenitis).
Sometimes, along the large lymphatic vessels, infiltrates and the formation of abscesses are noted - purulent lymphangitis, in which the inflammatory reaction is sharply expressed. Under the microscope, one can clearly notice the expansion of the lymphatic vessels, the lumens of which are partially filled with leukocyte accumulations, partially thrombotic masses, the surrounding tissues are infiltrated with leukocytes, edematous (picture of secondary perilymphangitis). Acute lymphangitis can turn into chronic. In such cases, the development of dense connective tissue in the vessels leads to impaired lymph circulation in them, its stagnation, which can be expressed by elephantiasis of the limbs, often lower ones.
Symptoms and course of lymphangitis depend on the localization of the process, the virulence of the microbes and the severity of the local reaction.
Treatment should be aimed at eliminating the primary lesion that caused damage to the lymphatic vessels. In complicated forms of lymphangitis (abscess, phlegmon, etc.), treatment is carried out according to general rules.