Pigmented purpuric dermatitis
Introduction
Introduction to pigment purpuric dermatitis Pigmented purpuric skin disease is a group of chronic skin diseases characterized by purpura-like papules and hemosiderin. Pigmented purpuric mossy dermatitis is common in middle-aged and elderly people, more men than women. The skin lesions are small rust-like mossy papules, accompanied by purpura-like lesions, which are purple-red or purple-brown. They can be merged into patches with unclear boundaries. The surface has a few scales, and the edges have defects, which are good for the calves. It develops upwards to the thighs, buttocks, waist and upper limbs. It is often accompanied by varying degrees of itching. The course of the disease is chronic and can last for several months to several years. basic knowledge The proportion of illness: 0.001% Susceptible people: no specific population Mode of infection: non-infectious Complications: pruritus
Cause
Causes of pigment purpuric dermatitis
The cause is unknown, there are reports of familial morbidity, patients with more local venous pressure factors, such as varicose veins or long-term standing, resulting in poor venous return of lower extremities, due to increased vascular permeability, red blood cell spillover and collapse leading to iron-containing blood The jaundice is aging, and some people think it is an allergic disease caused by focal infection.
Prevention
Pigment purpuric dermatitis prevention
Gravity and venous pressure increase are important local predisposing factors for the disease. Therefore, various factors that lead to increased venous pressure and poor reflux in the lower extremities should be avoided. Proper activity should not be long-term standing; patients with varicose veins should be treated or worn. Stretch socks also have a certain preventive and therapeutic effect.
Complication
Complications of pigment purpuric dermatitis Complications pruritus
Moderate lymphocytic infiltration and hemosiderin deposition in the upper part of the dermis, small blood vessels dilated.
Symptom
Pigment purpura dermatitis symptoms common symptoms itching purpura pimples
The shape of the lesion is initially a miliary-sized round or polygonal purpuric papule. The surface is smooth and rust-colored. The pressure does not fade. It can change to a yellow-brown color. The skin lesions are scattered or merged into pieces, and the edges are unclear.
Good hair, calf, thigh and lower torso.
Symptoms have varying degrees of itching.
Examine
Examination of pigment purpuric dermatitis
Histopathological examination was similar to progressive pigmentary purpuric dermatosis, moderate lymphocytic infiltration of the upper dermis and hemosiderin deposition; small vessel dilatation; endothelial cell proliferation.
Diagnosis
Diagnosis and differentiation of pigment purpuric dermatitis
It is not difficult to diagnose according to clinical features, and it needs to be differentiated from progressive pigmentary purpuric dermatosis and telangiectasia.
