A light yellow bug with a grain size and a color close to white suddenly appeared on the bed, jumping and biting. What kind of bug is it? How to clear it?

Adults and nymphs of lice feed on their hosts all their lives. The main hosts are terrestrial mammals, a few are marine mammals, and humans are often parasitic. Lice is not only harmful to blood-sucking, but also makes the host itch and uneasy, and can infect many important human and livestock diseases. Relapsing fever spread by lice is a worldwide disease, and the pathogen of this disease is spirochete. The life span of lice is about six weeks, and each female louse lays about ten eggs every day, which are firmly attached to human hair or clothes. About eight days later, the little lice hatch and bite and suck blood immediately. After about two or three weeks, you can grow into an adult after molting for three times. Lice live a parasitic life all their lives. People can spread to each other because of contact. The mode of transmission of relapsing fever is that after it bites a person, the bitten part itches. When people scratch it hard, they will crush the lice, and the pathogens in its body fluids will be brought into the bitten wound with scratching, and people will get sick. The best way to prevent relapsing fever is to eliminate lice; If we often bathe with hot soap, change clothes and pay attention to environmental hygiene, we won't get lice. If you have lice, you can kill them with drugs. Clothes with lice can be boiled in water. If you have lice in your hair, you should shave it off. Because crabs are mobile, they can live alone for 3-5 days after leaving the human body. In order to avoid cross-infection between people, it must be disinfected once with environmental disinfectant to avoid incomplete treatment.

Exclusion method:

Underwear sheets

These items can be boiled in water for about 10 minutes. If clothes (such as woolen clothes) are not resistant to damp heat, they can also be dry-cleaned.

Hair (of human body and head)

Shaving off the hair with lice and thoroughly cleaning the skin can completely remove the lice on it. To kill lice on hair with drugs, we should choose drugs with high efficiency and low toxicity. We can use 10 ml ethanol and 90 ml neutral shampoo to prepare a liquid for killing lice. When there are lice on the hair, dilute the liquid medicine with water 100 times, soak the hair with 30-50 ml diluent, and rinse the hair with clean water for half an hour, so as to continue for 3 days. You can also wash your hair with 10% Stemona soup first, then wrap your hair with a towel soaked in medicinal liquid for the night, and wash your hair with clear water the next morning. You can also wet your hair with 25% 100% ethanol (alcohol) solution every week, and it will be effective twice. Vinegar can dissolve mucus on lice eggs. If there are still lice eggs in your hair, you can apply vinegar to your hair in an amount of 20 to 40 ml, comb your hair with a comb the next day to comb the lice eggs down, and then wash your hair with clear water. There are crabs on pubic hair. It can be smeared with 25% Stemona ethanol (alcohol) solution or with the same amount of kerosene mixture 10% acetic acid solution.

Outside the human body

You can use 4 ml of 50% dichlorvos emulsion, add 500 ml of water and spray it on it. You can also dip a brush in 4 ml of 50% dichlorvos emulsion, and draw lines vertically and horizontally on clothes and bedding with lice. The distance between lines is 10 cm (3 inches). Then roll up or fold clothes and bedding and leave them for 2 hours to kill the lice inside.

head

Head lice disease refers to a disease in which lice parasitize children's hair. The main symptoms are: scalp itching, especially when strenuous exercise or head is heated. Examination shows that tiny white crystal lice eggs are closely attached to the hair roots. Unlike dandruff, it can't be easily removed. Head lice disease is an infectious disease, which is often caused by children's contact with lice carriers. Lice is a small insect that can fly to other people's scalp through contact. Adult lice lay eggs in the hair roots and hatch into lice two weeks later. Lice parasitize hair and grow by biting the scalp and sucking human blood. When it bites the scalp, the child feels itchy. Because lice are itchy and highly contagious, they must be cured in time. Prevention and treatment When a child is found to have head lice disease, parents can generally do the following work: If the child is found to be scratching his head all the time, especially when his head is hot, check the child's hair and carefully see if there is a white crystal attached to the hair root, which is not easy to remove. If you see lice eggs after checking your child's hair, you should go to the drugstore to buy a medicine to remove lice eggs. Wash your child's hair according to the instructions, and the medicine on your hair should be overnight to ensure that all lice eggs can be killed. Because some lice remover will have allergic reaction to asthma patients, you should read the relevant instructions carefully before using it. If this medicine is not suitable for your child, you should replace it with another medicine. Because head lice are easy to infect, in order to prevent the resurgence of head lice among family members, it is best for the whole family to wash their hair in the same way when using lice remover for children. Daily necessities used by children's heads, such as combs and hats, should be carefully cleaned with anti-stick detergent to avoid future troubles. Seven days later, the child and the whole family washed their hair again. If the child's head lice are still not eradicated after taking the above measures, or parents will not confirm whether the child has head lice, and the child is always scratching his head, then he should take the child to the hospital for medical treatment.