localized erythema migrans
Introduction
Introduction Chronic migratory erythema is a simple erythema. After chronic, it can be the skin of Lyme disease. The pathogen of Lyme's disease is the Helicobacter pylori. The mode of transmission is mainly arthropod () bites, and individual cases can also be stabbed by mosquito bites or thorns. The spirochete enters the skin, blood, causing various visceral damage and secondary skin erythema. The rash is often single, except for mild itching, no systemic symptoms, and the course of disease is several months to years. Occurs in the limbs, torso, especially in the lower limbs.
Cause
Cause
Infected biting hosts inject the Burgdorfer spirochete into the skin, and after local incubation, can migrate to the epidermis, forming a chronic erythema in the bite.
Examine
an examination
Related inspection
Indirect immunofluorescence test Coombs test UV filter
Often single hair, starting with a round, oval small red spot, only a few millimeters in diameter, slowly centrifugal expansion, after weeks to months, the erythema diameter can reach more than 50cm, the skin lesions disappeared after the normal skin color or Lavender, the edges of the ring are wider, slightly raised leather, no scales, blisters. Occurs in the limbs, torso, especially in the lower limbs. Except for mild itching, there is no systemic symptoms, and the course of disease is several months to years. If the skin is Lyme disease, multiple systemic symptoms such as joints, nervous system and heart may occur.
Diagnosis
Differential diagnosis
Need to be identified with the following symptoms:
Persistent pigment abnormal erythema is also known as gray skin disease. Ramirez (1957) first recorded that it was characterized by erythema or light gray pigmentation, which occurred at any age, but was mostly young and young, with no difference in gender. The disease is more common in Latin American countries.
The erythema annulare is a group of skin diseases characterized by ring-shaped or retrograde erythema. It is not an independent disease, but a dermal inflammatory reaction caused by various causes, that is, vasodilatation or cell infiltration in the skin. Performance on the top. It usually includes simple retrograde erythema, eccentric annular erythema, cleft erythematous erythema, chronic migratory erythema, and rheumatic marginal erythema. The erythema simplex guratum is an allergic vascular response, which is more common in young women.
