One characteristic of pubic lice is pruritus of the vulva, especially at night. Pudendal itching is not necessarily diagnosed as pubic lice. Pudendal itching may be caused by many reasons, such as not bathing for a long time, not changing underwear, or other infectious diseases of the urinary system, but it is not sure that it must be pubic lice. Because pubic lice have a certain incubation period, when the vulva itches or often itches, you must go to the hospital in time to check, find out the cause, treat as soon as possible, and ensure normal life.
Causes of pubic lice:
Now let's look at the causes of pubic lice. First, human body temperature is suitable for the growth of pubic lice. Under natural conditions, the average life span of female lice is 35 days, and the fecundity is strong. During this period, about 50 eggs were laid, and one male louse can fertilize more than one female louse. The eggs are laid at the root of human pubic hair. The eggs can be firmly attached to the pubic hair and are not easy to wash or brush off. Why do lice appear on themselves for no reason?
1、 The pubic louse disease is that the host of pubic louse is human, not animal.
2. Direct contact infection: refers to other non-sexual direct contact infection. Due to the limited living conditions, crowded houses and poor sanitary conditions, sharing the bed with patients with pubic lice can also be infected by close contact.
3. The transmission of pubic lice is caused by unclean sexual behavior: pubic lice generally do not leave their pubic hair, and only leave their original host during sexual intercourse and infect the new host. Therefore, couples often suffer from pubic lice, because pubic lice are usually transmitted through sexual contact, and pubic lice are also a sexually transmitted disease, which is one of the sexually transmitted diseases stipulated by the World Health Organization, especially among young men and women in disorder.
4. Other ways of infecting pubic lice (indirect contact):
Louse eggs often pollute underwear, towels, sheets, toilets, etc. with the fall of pubic hair. Other people come into contact with these articles contaminated by lice and become infected. The lice grab the hair nearby and suck blood with mouthparts. They can also crawl on the skin like grayish yellow particles, generally confined to pubic hair or lower abdomen. The louse eggs lie obliquely on the pubic hair and are rust-colored or reddish particles, sometimes like punctate crusts, which are easily distinguished from the white head louse eggs. It is grayish white before eating and reddish brown after eating. It takes about 4-5 times a day. When eating, lice bite human skin, release toxic saliva to human body, and excrete feces when sucking blood. Toxic saliva enters human blood and feces, stimulates the skin, and eventually causes local skin itching and inflammatory reaction in the perineum.