Scabies

Introduction Acne (dermatology), acne is an infectious skin disease caused by ticks (locusts). The aphids are parasitic in the epidermis of the human skin, where they lay eggs and move, causing a rash or small blisters in the affected areas, accompanied by itching. The disease can occur in all parts of the country, without gender differences; through direct or indirect contact with infection, contagious, rapid spread, often popular and spread among families and groups, many people have disease at the same time or successively. If the treatment is not handled properly, the condition can be repeated and it is chronically passed.

Cause

Acne is a skin disease caused by aphid-infected skin (mechanical damage from tunnels and stimulation of the secretion of venom). It can be transmitted sexually, especially in young men and women with sexually transmitted diseases. The disease has been included in the sexually transmitted diseases by the World Health Organization. The signs of acne are intense itching of the skin, and the rash is often found in the skin folds, especially the genitals. Acne is a disease that spreads through close contact. Acne is highly contagious and often infects each other in a family or group of dorms. The mites can survive for 2 to 3 days after leaving the body. Therefore, the clothes, bedding, shoes, hats, and pillows used by the patients can be indirectly transmitted. Sexual life is undoubtedly a major route of infection. Aphids are tiny insects that are invisible to the naked eye. There are numerous wavy wrinkles on the back of the aphids. There are several pairs of rod-shaped bristles and long scorpions in the back half of the torso. There are four pairs of abdomen in the abdomen. It is an anus. The mites have a small carcass, located at the front end of the torso, half of which is trapped in the trunk, and the cheeks are pincer-shaped, suitable for eating keratin proteins of the skin. Parasitic in the human epidermis.

The life history of aphids is divided into four stages: eggs, larvae, nymphs, and adults. The egg is oval, pale yellow, the shell is very thin, translucent, often 4 to 6 eggs gather together, produced in the tunnel excavated by the female. When the eggs are laid, the stools are also discharged. After the eggs are laid, the adults die at the blind end of the tunnel. The larva hatched from the egg and lived in the tunnel. Soon after it was peeled and turned into an adult, the female adult mated with the male adult. The female lays eggs in the tunnel and advances while ovulating. The tunnel is advanced 0.5 to 5 mm every day. The speed of migration is fast, the eggs are evacuated in the tunnel, the speed of migration is slow, and the eggs are densely packed in the tunnel. Another feature of locusts is the night crouching, which is often itchy due to increased activity of locusts at night.

an examination

1. There is a history of contact infection, and many people around are sick;

2. The rash is a small papule, a tunnel, a nodule, etc.

3. Occurs in the interphalangeal, wrist flexion, lower abdomen, medial femoral, external genital, etc.; head, palm, etc. are rare (except infants and young children);

4. Consciously itchy, especially at night;

5. Aphids or eggs can be found in the rash.

Differential diagnosis

The disease should be differentiated from the following diseases:

First, pruritus

Both children and adults can develop disease, but children are more likely to occur in the extremities and trunks of the extremities. The skin lesions are mainly wheal-like papules, such as solid bean-like, itchy, slow course, and non-infectious.

Second, eczema

Any age can be affected, there is no need for good hair, the skin lesions are pleomorphic, may have flushing, swelling, erythema, papules, herpes, blister, bullae, erosion, exudation, scarring, etc., no contagious.

Third, papular urticaria

Frequently in children, common in spring and autumn, occurs in the limbs and waist and abdomen, skin lesions scattered in the spindle-shaped papules, herpes and blisters, consciously itching, easy to relapse.

Fourth, rickets

Mainly in the trunk, skin lesions are secondary damage, such as scratches, blood stasis, finger joints without skin lesions, can find sputum and sputum eggs in the seam.

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