Symptom >> Dermatology >> Dermatology

Erythema (clearly bordered, raised above the skin)

Introduction
Cause
Examine
Diagnosis

Introduction

Introduction The erythema is an acute infectious disease in which the skin of the affected part suddenly becomes red and is colored as a coating. It is characterized by sudden onset of illness, aversion to cold and fever, local skin suddenly becoming red, color such as Dan coated with fat, hot and swollen, clear boundary, rapid expansion, can gradually heal within a few days, but easy to relapse. It is a local or systemic red rash that is localized or systemicly dilated by the dermal papillary capillary network. When the skin damage starts, it is one or several bright red spots. The mung bean to the soybean is large, and the surface has adhesive scales. Later, it gradually enlarges and is round or irregular. The edge pigment is obviously deepened, slightly higher than the center.

Cause

Cause

Sudden onset, aversion to cold and fever, local skin suddenly turns red, color such as Dan coated with fat, hot and swollen, clear boundary, rapid expansion, can be gradually cured within a few days, but easy to relapse blood and heat, blood and heat Knot, stagnation of the skin and hair, and because of the different parts of the disease, different from the onset of the face, more than the wind and heat, issued in the chest and abdomen lumbosacral, more than the liver and spleen smoldering, on the lower limbs, Most of them have damp heat, and those born in newborns are mostly caused by fetal heat.

Examine

an examination

Related inspection

Anti-polymyositis-l antibody spores agglutination test blood routine interleukin-1 (IL-1) anti-double-stranded deoxyribonucleic acid antibody (dsDNA)

Diagnostic points:

1, may have a history of skin, mucous membrane damage or foot moisture.

2, more in the hands, there are fish and shrimp thorns to break the skin history; erythema range is small, mild symptoms, no obvious systemic symptoms. Most occur in the lower extremities, followed by the head and face. Newborn erysipelas, often migratory.

3, local red hot burning, such as the shape of Tu Dan, swelling and pain, the edge of the erythema and the normal skin have a clear boundary, blister, purple spots can sometimes appear on the erythema, occasionally purulent or skin necrosis.

4, at the beginning there are symptoms of aversion to cold, fever, headache, and general discomfort.

5, blood routine examination of the total number of white blood cells and the proportion of neutrophils increased significantly.

Diagnosis

Differential diagnosis

The diagnosis should be differentiated from the following symptoms:

1. Local redness and swelling: The central ridge has a dark color, the surrounding area is light, the boundary is unclear, and most of the suppuration is generally not repeated.

2. Contact dermatitis: history of exposure to allergens, skin lesions mainly redness, blisters, papules, with hot, itching, and more pain; generally no obvious systemic symptoms.