Why do Mosquito bites itch and rise?
359603
I learned when a mosquito bites you, she's sticking her needle-like mouthpart into your skin and injecting saliva rich in anticoagulating enzymes so the blood will flow smoothly. Some people are sensitive to those enzymes so their skin itches and when you scratch it, it's irritating the skin even more which will lead to redness and minor swelling around the area of the bite. \n\nI could be wrong since my knowledge on the subject is more than 10 years old. ^_^;
16918
A mosquito flies an estimated 1 to 1.5 miles per hour. \n\nHere are some other fascinating mosquito facts. You'll notice, that a mosquito can smell you or another host from 20 to 35 meters away. So if you run fast enough to put more than that distance between you and the mosquito, then hopefully it will lose your signal and give up the chase!\n\nQ: How many species of mosquitoes are there? \nA: About 2,700.\n\nQ: And how many are resistant to at least one insecticide? \nA: More than 50.\n\nQ: What does a mosquito weigh? \nA: About 2 to 2.5 milligrams (for an Aedes aegypti).\n\nQ: How much blood does a female mosquito drink per, er, serving? \nA: About 5-millionths of a liter (for an Aedes aegypti).\n\nQ: How do mosquitoes find new hosts? \nA: By sight (they observe movement); by detecting infra-red radiation emitted by warm bodies; and by chemical signals (mosquitoes are attracted to carbon dioxide and lactic acid, among other chemicals).\n\nQ: How fast can a mosquito fly? \nA: An estimated 1 to 1.5 miles per hour.\n\nQ: How far away can a mosquito smell you or another host? \nA: 20 to 35 meters.\n\nQ: Why does a film of oil on water kill mosquito larvae? \nA: Because the oil clogs up the snorkel that the larvae use to breathe.\n\nQ: When do mosquitoes feed? \nA: Day-time. Night-time. And all times in-between. Truthfully, some species prefer different times of day or night. This behavior may have evolved to match the host's behavior.
867604
People arent really sure if mosquitoes are attracted to light but one source says mosquitoes actually veer away from the light source at the last minute. To the mosquitoe, the area just outside of the light appears darker. Moths, being nocturnal, head towards the dark patch, which is always just around the light. Confusing aint it?
610830
the reason our skin itch sometimes is due to the effect of our own body immune system against antigen (foreign body not recognize by our immune system). \nWhen antigen enters our body through skin, it is detected by Langerhans cells beneath our skin and triggers our immune system to release histamine to eradicate the antigen, and the histamine secretion is the reason why our skin feel itch sometime.
517120
They carry tiny amounts of blood from person to person, so they could transmit diseases. Yes, any mosquito that bites could spread disease.\n\nIt is true that it takes about a hundred times more virus particles to transmit HIV as compared to hepatitis B, so in a sense it would take about a thousand infested mosquito bites to get HIV that way.  It would be much likely to catch other diseases such as encephalitis, dengue fever, or malaria than HIV from mosquitos.
712026
When you exercise, your heart pumps faster and your blood vessels dilate as a mechanism for heat loss due to your energy expenditure.  With exercising, you are detoxifying your body of unwanted wastes and toxins through sweating.  One reason you may be itching is because of the release of  these unwanted wastes through the skin.  This should resolve after exercising and having taken a shower. Another more probable reason is that your blood cells release their histamines, and these mediate the itchy sensation you feel.  This should also resolve after exercising. Not everybody has the same reaction to increase physical activity.  Good luck!
318778
Itching is low grade pain. Sometimes a change of temperature balances the nerve endings just enough to change the natural signal for awhile.
604016
an itch is caused by an inflammation or irritation of the skin...\nwhich is generally due to some skin disease etc..
996579
mosquito bites....spiders bite three in a row if they don't get disturbed in the process\n\nmaybe she has eczema
1071109
You get an itch because there is an excess of dry dead skin and you scratching is your body's way of shedding and getting that dead skin off so the new skin can breathe
1052143
Mosquitoes do not actually “bite” humans; they “feed” on them. Female mosquitoes require protein to produce their eggs and obtain this protein from the blood of humans and other animals.  Only the females feed.  I think they're also attracted to scents that some humans emit.  I also heard once that they don't bother people who are tanned near as much as a non tanned person.  I'm not sure how true that is if at all.
11474
The itch you feel is a reaction to the mosquitioes' saliva and your skin. I don't think I have ever heard of anyone that is immune to it. Also, you getting bitten has alot to do with your body temp, and odor. If you have a sweet smelling perfume on or emit a sweet odor, you attract mosquitoes and those wearing no scents and bug spray of course, are more likely to not get bitten.
1011917
The itchiness is not caused directly by the mosquito's bite or the chemicals in the mosquito spit but by the body's immune response to them. Your immune system releases histamine, a protein involved in many allergic reactions, in order to fight off a foreign substance. The histamine causes swelling around the puncture wound as blood rushes to the affected area, and as a side effect makes you itch. \n\nWho knew?\nI prefer to squish them before they get a chance to bite me!
352644
Mosquitoes are attracted first and foremost to carbon dioxide.  When we breathe out, we produce this gas and they follow the trail until they find us.  They are also attracted to heat and humidity that we give off as well as the chemicals in our sweat.  Since we produce so much heat and sweat from our scalp and forehead and carbon dioxide is released on our breath, mosquitos seek out the human head as their initial target.
772576
Sometimes bug bites are just persistent.  It also depends on your allergies/immune system.  Basically, some things just irritate some people more than others.  Even different places on our bodies react differently (like places where you tend to move more tend to get more irritated).  Recently, I stumbled upon some red ants while wearing flip-flops.  I've been bit before by red ants, but I have never reacted like this.  I got three bites on the top of my foot. . . this was before halloween and they're STILL itching like crazy every now and then.  \n\nThe best thing I have found to do is to buy an antihistamine cream to put on them when they itch.  If you have been taking an antihistamine like Benadryl, the cream is nice because it doesn't make you sleepy!  The antihistamine keeps your body from "overreacting" to stuff, which is why it is often used for allergies.  When you use it for the bites, they will itch less and can heal quicker because itching them makes the reaction worse (so DON'T itch them!!!).  I would do that until they go away completely.  If they begin to get bigger (other than just the slight swelling) and the redness/swelling starts to spread out, you should consider re-visting your doctor so they can give you a prescription to better treat them.\n\nI hope this helps!!
888859
look at this ewbsite, they explain how each constituent works, improving blood supply may be the reason but there is no scientific data suggestiong itching from improved blood supply to the skin, if itching persists or worsens, see a doctor, good luck
426435
Because of the viral load. It does not replicate/ amplify enough in the mosquito to cause an infection in its next victim...\nIf say the mosquito suck a 'mouthful' of blood from an HIV individual...that would only work out to maybe 1 or 2 virions. Far more is needed for an infection to be transmitted.