What Is Papular Urticaria?

Papular urticaria is also called urticaria moss or baby moss. It is a common allergic skin disease in infants and children, but it can also develop in adults. Often, several people in the same family develop the disease at the same time. Occurred more in spring and autumn. This disease is a disease named after its symptoms. In fact, this disease is worm bite dermatitis. Clinical features are scattered, slightly hard, papules with vesicles on the top. There are spindle-shaped flushes around the periphery, and itching is conscious.

Ji Juan	(Resident) Writing	Nanjing University of Chinese Medicine
Yang Xueyuan	(Chief physician) audit	Dermatological Hospital of Chinese Academy of Medical Sciences

Papular urticaria is also called urticaria moss or baby moss. It is a common allergic skin disease in infants and children, but it can also develop in adults. Often, several people in the same family develop the disease at the same time. Occurred more in spring and autumn. This disease is a disease named after its symptoms. In fact, this disease is worm bite dermatitis. Clinical features are scattered, slightly hard, papules with vesicles on the top. There are spindle-shaped flushes around the periphery, and itching is conscious.

nickname

Pimples-like urticaria, urticaria moss, baby moss

English name

papularurticaria

Visiting department

dermatology

Common causes

Insect bites

Common symptoms

Itching

Causes of papular urticaria

Most of the diseases are related to insect bites, such as allergic reactions caused by mosquitoes, bed bugs, fleas, lice, mites, maggots and other bites. Individual qualities respond differently to insect bites. Insects bite the skin and inject saliva, which can cause the disease in children who are allergic to these substances. This is a late-onset allergic reaction, which takes about 10 days to sensitize. At this time, another bite can cause a rash. Repeated bites can cause desensitization, so the disease usually stops around 7 years of age.

Clinical manifestations of papular urticaria

Skin lesions are more common in the trunk, with limbs stretched to the side. Cluster or scattered. It is a red spindle-like lesion with a slightly spindle-shaped size ranging from mung beans to peanuts. Some may have pseudopods, often with small blisters on the top, and some will become hemispherical bulging tension blisters soon after the occurrence. No redness. Skin color or light red or light brown, and some rashes are large chestnut papules, and after the scratches, they were swelling like wind. Old and new rashes often coexist. Generally, young children are marked with redness and swelling, with bullae, and often have itching and affect sleep. Scratching can cause secondary infections. The rash subsides after 1 to 2 weeks, leaving temporary pigmentation, but new rashes can occur one after another to prolong the course of the disease. Often relapses, generally without systemic symptoms. Local lymph nodes are not enlarged.

Differential diagnosis of papular urticaria

The difference from urticaria is that the disease is not just wind masses, but wind mass-like damage.

1.Hebra prurigo

It is mainly rice grains extending from the extremities of the limbs to the mung bean papules. The infiltration is obvious and multi-symmetrical distribution. Scratches, hemorrhoids, and eczema can be seen, often accompanied by enlarged lymph nodes. Chickenpox has pimples and blistering, and there are significant redness. There are also rashes on the scalp and mucous membranes. Some are dark brown in color, with mild itching, prodromal symptoms and mild systemic symptoms.

2. Bullous papulous urticaria

Children often have wind-like lesions at the same time. According to the nature of the rash and the history, it is easy to distinguish it from pemphigoid and bullous epidermolysis.

Pimple urticaria treatment

Oral antihistamines have a good effect. Can be used topically with 1% mint calamine lotion or 1% mint cream (children should pay attention to drug stimulation) and glucocorticoid cream can relieve itching and inflammation. If there is a secondary infection for anti-infective treatment, Jingfang Decoction or Ephedra Forsythia Chixiaodou Decoction can be used in Chinese medicine.

Pimple urticaria prevention

Pay attention to personal and environmental hygiene, eliminate fleas, mites, bed bugs and other animals, and avoid suspicious food.