Friday, 14 November 2014

Why Do Mosquito Bites Swell Up

A mosquito bite can result in itching, among other symptoms.


Mosquito bites often result in redness, swelling and itching. While most mosquito bites will go away with tropical application, some mosquito bites can cause allergic reactions and may be life threatening in severe cases. In some instances, the female mosquito transmits serious diseases such as West Nile virus, malaria, yellow fever and dengue fever.


Types


While male mosquitoes feed on plant nectar, female mosquitoes need blood to get their protein source. They require protein to mature their eggs, which they lay on the surface of stagnant water.


Effects


When the mosquito inserts its proboscis (needlelike mouth part) into the skin to siphon blood, it deposits saliva into the skin in the process. The mosquito's saliva contains digestive enzymes and anti-coagulants, which prevent blood from clotting.


Reaction


The body's immune system in turn reacts with the saliva to cause swelling and itching. The extent of the reaction varies according to the person's sensitivity. In some cases effects may not show up until 24 hours later.


Treatment


Never scratch the swelling, since breaking the skin can cause bacterial infection. MayoClinic.com suggests applying hydrocortisone or calamine lotion. Taking an antihistamine such as Benadryl, Claritin or Zyrtec may relieve symptoms in more severe cases. If you suspect you have an allergic reaction or have contracted blood-borne diseases through the bite, see a physician immediately.

Tags: into skin, severe cases, swelling itching