Prurigo in children

Introduction Pediatric pruritus is also known as Hebra pruritus or early pruritic rash and mild pruritus. Mostly in childhood, skin lesions start with red papules, miliary to mung bean size, or wheal or papular-like urticaria-like rash. Later it becomes an arcuate nodular papule or small nodule damage. Scratch, bloody or eczema-like changes can occur due to scratching. The extremities of the extremities are common, but the back, head and face can occur. Symptoms of the symptoms are severe and the pigmentation subsides after the rash subsides. It can also be repeated. A small number of patients continue to adulthood. The axillary and inguinal lymph nodes can be swollen.

Cause

The cause of this disease is unknown, generally considered to be related to allergic reactions, and some patients have a family history of allergies, so pediatric pruritus is associated with atopic dermatitis. Some have papular-like urticaria, and pruritus is related to insect bites. Because of the pruritus of pregnancy, it is self-healing after delivery, so some people think it is related to changes in endocrine. Some scholars believe that allergens are exposed to allergies, sunlight, food and drugs. In addition, with digestive system dysfunction, infection of the lesion, malignant tumors in the body, neuropsychiatric factors, etc. may be related to the occurrence of this disease.

an examination

Related inspection

Blood routine

Mainly for pathological biopsy: a non-specific lichen-like tissue reaction was observed. Epidermal hyperplasia, epidermal palsy, intercellular edema, basal cell liquefaction, perivascular cell infiltration and vasodilation, pigment sites showing pigment incontinence.

Occasionally, eosinophils in peripheral blood increased.

Differential diagnosis

1. Prurigo Vugaris: Also known as Prurigo Simplex, it is more common in middle-aged men and women. The damage is a rounded round pimples. The size of mung beans to peas varies, and there are tiny blisters on the top of the pimples. However, the blister is often scratched and not seen. The surface of the blister is left with serous scarring. The damage appears in batches, causing severe itching. Due to long-term scratching, scratches, lichenification and pigmentation may occur. Nodules.

The rash occurs in the extremities of the extremities and the torso and buttocks. Damage naturally disappears in the short term, but sometimes it recurs.

2. Prurigo nodularis: also known as Urticaria Perstans Verrucosa damage from the beginning of the red or red papules, quickly turned into a dome-shaped solid nodules, from peas to nails Size, usually taupe or reddish brown. Damage to the surface of the keratinization, rough, scorpion-like, touch a solid feeling. Consciously itchy, due to long-term friction and scratching, bleeding and blood stasis, the surrounding skin often has pigmentation and mossy changes, sometimes similar to coin-like eczema.

Damage often occurs in the extremities, especially on the side of the calf, and the back or other parts can occur. The number varies, and the nodules have a tendency to align along the limbs. The disease is more common in adults, with women accounting for the majority. Chronic, long-lasting.

3. Pregnancy pruritus (Prurigo gestationis): A woman who often occurs in a second pregnancy. A small number of patients can also be seen in pregnant women in the first pregnancy. The damage occurs in the third to fourth months of pregnancy, or the last two in pregnancy. month. The rash is a reddish papule, a herpes, or a wheal-like lesion, and a small number of patients have similar damage to erythema multiforme. Symmetry is distributed in the trunk, buttocks, thighs and even the whole body. It is violent and itchy. It can cause scratches, bloody and mossy changes due to scratching. Most patients have a natural rash after delivery, and a small number of patients can also not decline immediately after delivery, lasting for months or years. Pregnant women with severe rashes may have stillbirths.

4. Summer Prurigo: Some scholars believe that the disease is mild summer hydroposis (hydroa aestivale) or acne vacciniforme. At the beginning, it is a wheal-like papule, which can cause blisters and itching is severe. However, no acne-like damage occurred, and scars were not left after the rash subsided. Often occurs in adults.

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