You can’t imagine how “dangerous” it is to play with your phone while turning off the lights!

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#Don't turn off the lights to play with your phone#

This behavior has once again sparked heated discussions.

Besides hurting the eyes, it also attracts insects

Recently, a netizen turned off the lights and played with his phone when he felt something crawling on his face. He found that it was a small insect attracted by the light of the phone. Because he had read popular science about rove beetles, he did not rush to kill the insect, but gently brushed it off his face. He thought he had escaped, but he ended up in the hospital... So, what exactly is a rove beetle? Why can't you kill it with a slap?

Today we will study:

What is a rove beetle?

What harm might rove beetles cause?

How to prevent pederus dermatitis?

Rove beetle

Rove beetles are small insects similar to flying ants. They are the most species-rich family in the order Coleoptera. They are phototactic and high-flying and prefer places with lights .

Rove beetles feed on small insects, plant pollen and fungi, and some of them parasitize animals. Generally speaking, they are beneficial insects. However, only a small part of rove beetles are threatening to humans and can cause rove beetle dermatitis, which are called " poisonous rove beetles ".

The appearance of the poisonous rove beetle is similar to that of a large ant, with a black and yellow body and orange or orange-yellow prothorax and abdomen. The poisonous rove beetle harms the human body not by biting, but by direct contact with the insect's body fluids , which contain a powerful blistering toxin produced by Pseudomonas bacteria, the so-called " rove beetle toxin ", which is a chemical substance that the insect uses to resist external invasion and is also the "culprit" that causes damage to the human body.

Paederus rove toxin is a strong acidic substance. When the toxin contacts human skin, it causes irritant contact dermatitis and skin damage. The usual ways of causing dermatitis are:

• Directly caused by the worm being crushed against the skin ;

• Indirect cause by touching other parts of the body with fingers contaminated with insect fragments ;

• The worms hide in face towels or clothes, and when they are rubbed into a pulp, the venom comes into contact with the skin .

Therefore, if you find a rove beetle, don't swat it . Rove beetles don't have poison glands and won't bite or sting people, but when they crawl on human skin, they will secrete body fluids from their joints, causing skin lesions and linear scars. You should shake it off, blow it off , or use something like a fan to brush it away as soon as possible.

Paederus dermatitis

1. What are the symptoms of pedereworm dermatitis?

Symptoms are generally mild, often on the face, neck, trunk and limbs, presenting as flakes, strips or clusters of edematous erythema, with patients experiencing itching or burning pain, and in severe cases, blisters, pustules and erosions may occur. The shortest course of the disease is 4 days and the longest is 20 days, with the most severe symptoms within 2 to 5 days .

2. Will pedere beetle dermatitis cause serious complications?

Generally speaking, pedereberrhoea dermatitis does not cause systemic symptoms, but some patients with sensitive skin or poor resistance may develop infections in addition to dermatitis, with accompanying symptoms such as fever, headache, dizziness, nausea, and superficial lymphadenopathy .

3. Is the occurrence of pedereworm dermatitis seasonal?

Paederus dermatitis usually occurs in summer and autumn, especially in hot and humid weather after rain, but it is also common in some areas with year-round humidity. In addition, the disease can occasionally be seen during the rainy season.

4. What are the treatment principles for pedereworm dermatitis?

Paeder beetle dermatitis requires early diagnosis and early treatment . If treated early, the patient's rash often subsides quickly, and there may be no pigmentation left after healing or the remaining pigmentation may be very light and subside quickly.

5. Does pedereophilus dermatitis require follow-up visits?

According to your own situation, if the diagnosis and treatment of rove beetle dermatitis are relatively timely and the condition is well controlled, you don't need to return to the hospital for follow-up. Some patients may be left with heavy pigmentation or shallow scars, and need to return to the hospital for follow-up and be given some drugs to promote epidermal repair. Some patients are not treated in time and need to return to the hospital for several times for long-term treatment.

How to prevent it

Adult poisonous rove beetles like to breed in moist and grassy places , such as freshwater lakes, swamps, ditches, ponds, river floodplains, weeds, and rice, wheat, rapeseed, radish, tobacco, cotton and other crop fields. They have obvious phototropism (especially to fluorescence) and height-tropism.

With the improvement of living standards, urban buildings are getting taller and taller. Many lower floors are dark and damp without sunlight all year round, which makes them the favorite places for rove beetles. In addition, some basements and other places with heavy moisture are also the favorite places for rove beetles. Both adults and children can get sick, especially those working under lights at night.

To prevent pederinella dermatitis, you need to:

1. Regularly remove weeds, rotten wood, garbage, etc. around the house .

2. Do not pile up waste items indoors. Keep the room clean and tidy so that poisonous rove beetles that invade the room have no place to hide.

3. Install screen doors, screen windows, and hang mosquito nets in summer to prevent poisonous rove beetles from flying into the room and reduce the chance of human contact with the insects.

4. Spraying with insecticides such as bromopyrin or fenvalerate can effectively kill poisonous rove beetles indoors and outdoors.

5. Turn off the lights when sleeping and do not play with your mobile phone in dark conditions .

6. When you find a poisonous rove beetle crawling on your body, do not slap or rub it with your hands . Gently blow it off or use other objects to remove the insect. If your hands have come into contact with insect fragments, immediately wash them repeatedly with soapy water. If the condition is serious, go to the hospital immediately.