Red Lice Bites On Neck. Does head lice always cause itching? First of all no, most people don’t experience itching symptoms when they have Head Lice. Furthermore you need to have lice for at least 3 months before you can start to have itching symptoms. This is because head Lice don’t want to be discovered while they are setting up a Lice colony on a new host. And it takes 1-3 months for a successful lice colony to become well populated. In addition the new colony doesn’t want to be discovered until it has sent out satellite lice to other hosts. After 3 months the host sometimes has an allergic reaction, which causes the itching. The Head Lice leave saliva, an anticoagulant, and an anesthetic when feeding on a human host. All of these substances can trigger an allergic reaction to the bites.
Red Lice Bites On Neck. One common urban myths about head lice is that your scalp will be itchy. In fact, very few people who have head lice experience itching as a symptom. The truth is that is takes 2 to 3 months of an active head lice infestation before there is even a chance of itching. Why is that? Because when lice feed on the human scalp, they leave behind a combination of saliva, anesthetic, and anticoagulant when they take a blood meal. And these substances do not initially cause an allergic reaction in humans. However, after an extended period of time, and at least 10,000 – 50,000 head louse bites, a small percentage of people will develop an itchy scalp and/or an allergic rash on the back of the neck from the bites.
Red Lice Bites On Neck. In addition head lice have become resistant to common pyrethroid based OTC lice products. This is where the term “super lice” comes from. Parents often ask “what could cause my scalp to be so itchy? In fact Your scalp can itch because it is sweaty, hot, dry, or because you recently tried a new hair product.
Red Lice Bites On Neck. Itching that is derived from psychological symptoms can be classified as delusional parasitosis or psychogenic itch. Most parents will feel itchy when the word lice is first mentioned. This is a normal reaction that does not necessarily indicate the presence of head lice. Most of the itching associated with head lice is due to an unhappy scalp. What can cause an unhappy scalp? First of all pesticide lice removal products such as pesticide lice shampoos are very caustic and will make your scalp unhappy. Secondly repeatedly lice combing your child’s scalp can result in an unhappy scalp. Just like with a mosquito bite, itching can last up to 2 weeks after the lice are no longer there. It still takes time for the histamine reaction of the lice feeding on the scalp skin to settle down.
So, if you are feeling itchy be sure to consider other possibilities before assuming you have head lice. If you want the Peace of Mind of a definitive head lice diagnosis, give NitWits a call today at 617-816-9487. NitWits, Boston’s Premier Class Lice Service.