When we get mosquitos bites why does our skins swollens and itches???
* I know they don't really bite lol*
2006-07-26 15:03:31 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Histamine
2006-07-26 15:16:56 · answer #1 · answered by Randy G 7 · 0⤊ 0⤋
Because as they insert their stylets in your skin they regurgitate saliva. Researches have found many important substances in their saliva, most of them help the mosquito in one way or the other. For example some substances dilate (or make bigger) the capillaries so they can more easily extract your precious blood. Some others are anesthesic (so you don't feel de bite) and yet others are anticoagulant (so the flow of blood is quick and uninterrupted) allowing them to suck your blood before you kill them. Some cells in your skin belong to the Immune System (Langerhan cells and others), when they come in contact with foreign molecules (substances) in the mosquito's saliva they react quickly and present this substances to effector cells that proke an acute inflammatory response with redness, swelling, itching, and warmth. It is a normal reaction of your skin and an attempt to heal the stupid mosquito bite.
2006-07-26 15:14:17 · answer #2 · answered by jorge f 3 · 0⤊ 0⤋
When the mosquito stabs her needle-like mouthparts through the skin of her victim, she injects her saliva -- teeming with digestive enzymes and anticoagulants. The first time a person is bitten, there is no reaction. With subsequent bites, the person becomes sensitized to the foreign proteins, and small, itchy, red bumps appear about 24 hours later.
2006-07-26 15:09:29 · answer #3 · answered by ??????????????? 2 · 0⤊ 0⤋
Mosquito's inject a substance before they suck the blood. The substance that they inject is a chemical that makes the blood flow without clotting (so they can suck the blood through their tiny little tube-mouths).
Because the injection contains a protein, your body reacts to it as if it were an infection. You swell up and it itches just as if it were a bacterial infection.
2006-07-26 17:45:43 · answer #4 · answered by Bernard B 3 · 0⤊ 0⤋
They inject a substance into your musculature to A) anesthetise the area so you wont feel the prick and B) to prevent your blood from clotting while they suck it. This chemical happens to be an irritant and causes swelling and itching.
2006-07-26 15:07:57 · answer #5 · answered by milo.3600 2 · 0⤊ 0⤋
Its an allergic reaction to the chemical the mosquito uses to numb the skin. That numbing agent is why we don't feel them pierce our skin.
2006-07-26 15:07:20 · answer #6 · answered by James_Stormwind 3 · 0⤊ 0⤋
They inject a chemical so that your blood doesn't clot, and they can feed. You are having a reaction to that chemical that causes swelling and itching.
2006-07-26 15:49:36 · answer #7 · answered by angiesman10 1 · 0⤊ 0⤋
It is your body's reaction to the anti-coagulant that mosquitos inject us with to make drinking our blood easier to them. That is how malaria is transmitted.
2006-07-26 15:07:31 · answer #8 · answered by damndirtyape212 5 · 0⤊ 0⤋
allergic reaction
2006-07-26 15:38:16 · answer #9 · answered by Ouros 5 · 0⤊ 0⤋