Why do some people have back itch?
353380
because they can't reach it to wash well.
650112
Simply stated--Scratching relives the feeling of itchiness because as we scratch we activated some receptors in the skin called Anandamides (which act in the process of relieving pain and other related pleasurable sensations)
49437
Most people don't want anymore hair on their back!
311894
an itch is when something causes histamines in your skin cells to be released. then your sensory cells become depolarized and signal to your spinothalamic tract. itches are controlled by your spinal cord if i recall from anatomy class, because it is not really needed to be noticed by your cortex. if you noticed every single itch in your cortex you would most definetly go insane. \nanti-histamines are usually in allergy medication to relieve itchiness.\nim pretty sure you might scratch hard enough to remove cells, but i dont think scratching is used for removing dead cells.\nthis might be a a bit vague or not quite correct but its the best i could remember.
318778
Itching is low grade pain. Sometimes a change of temperature balances the nerve endings just enough to change the natural signal for awhile.
471082
Well, three quesses.\n According to your hypothesis we rub in dirt and bacteria, so maybe nature is doing this on purpose to make us get bateria on us to build up our immune systems. \n Or maybe there are chemicals or enzymes in things that bite us or touch our skin (like being allergic to metal) that cause the itch. \n But I think the most popular answer to this queston would have something to do with the fact that during a months time your skin is completeky recycled meaning, the layer that was on the very bottom at the begining of that month is now the top layer of skin. You itch because dead skin is needing to be scracted off.
84105
When a part of your body is itchy, it is because the nerves on that part of your body are sending some sort of signal to your brain.  Your brain then processes that signal as itchiness.  If your brain is receiving no signals at all from a part of your body, it sometimes just makes something up.\n\nSince the brain doesn't feel pain, some types of brain surgery can be done with awake patients.  An interesting thing to think about is that when a brain surgeon pokes random parts of a patients brain, the patient will "feel" sensations at corresponding parts of their body.
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.
1185337
A dog likes to scratch, we know that. \n\nWhen they feel their stomach being scratched (and they're not scratching it) the moving leg is a residual/ghost response..........like they would be doing if they WERE scratching themselves.\n\nWhen someone tickles us or scratches our backs for us we usually have the urge to "help them out"......but it's more like a "leaning into it"  or a retreat response.
809249
Probably the thrusting caused their back to hurt since it is your lower back that you use to thrust.
402491
an itch is a misfire of a nerve ending.(i think).  its along the same lines of why you can feel like you're wiggling your toes after you have your leg amputated.(lol)
149285
Could be one of a few things or a combination of things:\n\n1.) The hair is growing back. The skin is very sensitive in that region and the hair growing back could cause itching.\n\n2. You may have extra sensitive skin down there and the products you use are irritating it.
241287
It could be an underlying health problem ,ie.kidneys or liver problems you should get checked out,have you tried any creams and you dont say were the itching is.
1129499
When you scratch your itch, you are temporarily paralyzing the sensors in your skin.
238229
Because your body is not use to too but after a while your body will get use to it then the itching will go away and its totally normal...
155282
normal back pain is caused by strain on the back muscles. if you strengthen your core muscles and your abdominals it will share the work load with your back.
367187
I have heard several different explanations. Some are more scientific than others. It used to be that some doctors thought itching was actually a slight form of pain, but this is not believed to be the case by most folks today. \nSome believe that irritants landing on the skin cause itching, but itching can also be caused by skin stretching too quickly (which often happens during pregnancy) or is too dry. \nSome people think to remedy skin itching taking zinc or using lotions will ease the symptoms. Others suggest running cold water on itches or hot water on itches. I have also heard of people alternating super hot water to kill the initial itch, and follow it quickly with colder water. Doctors tend to discourage use of hot water, as it dries the skin further and since lack of moisture is one reason to have itching, keeps a vicious cycle going.\nBut all of this does not generally answer what an itch is. Most medical definitions are not helpful in that respect, and it was years before I got any sort of real illumination on this issue. It wasn’t till I took zoology and genetics that one of my professors finally made it clearer.\n I was lead to believe by my professor that it was really mostly a case of a sodium build up around the mylination around your nerves that is overloading your nerve endings in that area. Scratching provides a way to break up the sodium deposit and realign the elemental/mineral concentration to a more normal level. So an itch is a build up or change in the flow of chemicals that surround the nerve sheaths, causing the nerves to react in the skin. \n\nThat said, scratching while nice initially often damages the skin and can lead to cyclical scratch/itch/scratch issues, that further irritate the skin and cause greater damage.