Body lice tend to pass from person to person in places where people have close physical contact or share resources like beds and blankets, such as shelters. Different factors may cause a person to live in a place where body lice can spread more easily. This can be related to socioeconomic or health inequities.
Head-to-head contact with an already infested person is the most common way to get head lice. Head-to-head contact is common during play at school, at home, and elsewhere (sports activities, playground, slumber parties, camp). Although uncommon, head lice can be spread by sharing clothing or belongings.
The longer answer goes back over 800,000 years. Scientists believe head lice began to evolve on a different path than body lice about the time humans started to wear more clothing. Body lice evolved to attach to clothing fibers which are typically thicker and stronger than a human hair. Head lice stuck with the scalp.
A person gets head lice because the insects crawl from person to person by direct contact or by sharing items — including combs, brushes and hats — with another person who has head lice. Poor hygiene doesn't cause head lice.
It's less common for head lice to spread without direct contact. But the insects may spread from one person to another through personal items, such as: Hats and scarves. Brushes and combs.
You can get lice by coming into contact with either lice or their eggs. Lice can't jump or fly. They spread through: Head-to-head or body-to-body contact.
Adult lice can live up to 30 days on a person's head. To live, adult lice need to feed on blood several times daily. Without blood meals, the louse will die within 1 to 2 days off the host. Life cycle image and information courtesy of DPDx.
You can find head lice on the scalp, neck, and ears.
Lice are attracted to the blood they get through your scalp – short, long, clean or dirty.
The oldest physical evidence of head lice on a human was a nit found on the hair of a 10,000-year-old body at an archeological site in Brazil. Lice combs have been found in the tombs of Egyptian royalty, and even Cleopatra was said to have solid gold lice combs buried with her.
Their full life cycle, from egg until death, lasts a maximum of 35 days. The eggs are called nits and hatch into small insect forms — called nymphs — which then grow into adult lice. The adult lice can begin to create more eggs as soon as they hatch and the cycle begins again.
Throughout ancient Egypt, people were tormented with lice. Remedies for the common person included eating a special meal mixture with warm water, and then vomiting it up. Others believed a recipe of spices mixed with vinegar rubbed on the scalp over a few days would suffocate them out.
Permethrin lotion, 1%;
Permethrin lotion 1% is approved by the FDA for the treatment of head lice. Permethrin is safe and effective when used as directed. Permethrin kills live lice but not unhatched eggs. Permethrin may continue to kill newly hatched lice for several days after treatment.
Not everyone feels lice moving around on their scalp, but some people do. Dr. Garcia says that most of her patients say they “don't feel anything,” but others may get a creepy, tickling sensation as lice move around their head.
Body lice bites can cause intense itching, and you may notice small areas of blood and crust on your skin at the site of the bite marks. See your doctor if improved hygiene doesn't remove the infestation, or if you develop a skin infection from scratching the bites.
They need human blood to live. Head lice usually stay close to the scalp and behind the ears. You might also spot them on the eyebrows and eyelashes.
Washing clothes in hot water, 125 degrees Fahrenheit or higher, will kill body lice and their nits.
As head lice can live on pillows, you'll need to clean them. Adult lice can only survive for two days without a host. However, they can still lay eggs. If the infected person has had a lice treatment and then picks up stray lice from their pillow, the lice infestation cycle can start all over again.
Suffocate the Lice
Soak your child's head in olive oil or coconut oil. Cover with a shower cap for at least 2 hours (or preferably overnight). When ready, remove the shower cap, and separate the hair into small sections, then use a metal nit comb to carefully remove the lice and eggs. Rinse the hair well with shampoo.
Hairspray makes it harder for the louse to grab hold. The smell of hairspray and the use of solvents (sad but true) in them can also deter creepy crawlies from finding their way in. Not to mention that if you're tying longer hair back, you've got a double whammy.
Small studies have also shown that tea tree oil in combination with lavender oil can kill lice eggs and reduce the number of live lice. Tea tree oil seems to be relatively safe for use on the skin, although it can cause irritation or swelling for some. Remember, though, that it is poisonous if swallowed.
Tea Tree. Tea Tree oil has multiple properties fight bacteria as well as helping unclog pores on the scalp, helping to prevent infections. A trusted ingredient to help prevent head lice.
Adults are not immune to head lice. In fact, if you have any close contact with children or even parents of children you can be at risk of catching them if they have them. Lice transfer primarily through head to head contact, so you would have to get close to the other person.
'' Generally, children are less protective of their personal space, more likely to come into physical contact with one another, and more likely to share personal items like clothing or hairbrushes, which make it easy for the bugs to travel from person to person.