When you get an itch is it true that it's caused by your body replacing dead cells?
130991
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.
296369
Sounds like a reaction to something you did that caused you to become allergic. The symptoms are the itchy, followed with hot red bumps, brought on by you intitating the scratching. First you need to ask yourself some questions....Did I eat something to cause this reaction? Did I use a new cosmetic on my skin or a old one? Did I try a new detergent? Or is the one I always use making me get a reaction? Is the medication or herbal pills or both making me break-out? What ever it is drink alot of water to flush out your system...keep a written journal on what you do and just monitor your self. It is cheapier to heal yourself than visit the doctor. Use common sense. Use products that are allergy-free. Good Luck
215446
I would say either you are really really tired, or you have an allergy to something in your environment. Mine burn a lot when I am extremely tired.
382461
An itch is caused by an irritation on the skin.\nA yawn is caused by tiredness.
594189
I suppose the reason you see that answer so often is that some people don't realize how many causes there are for genital itching.  A yeast infection is a very common cause of vaginal itching.  Most women get at least one yeast infection in their lives.  This problem can be cured by over-the-counter medication, although you should consult a doctor to make sure you really do have a yeast infection (see second link).  Yeast infections are rarely sexually transmitted.\n\n"Crabs" are actually pubic lice.  They are treated in exactly the same way as head lice--washing with special shampoos, then removing the dead nits with a fine-toothed comb and making sure to wash all clothing and linens in order to prevent reinfestation.
624647
It could be a symptom of Hepatitis or something called Lichens Planus (I think I spelled that right). Make and appointment right away to see a Dermatologist so you can be properly diagnosed and hopefully get some medication to get rid of the itch. The longer you wait and the more you scratch, it could leave really bad scars that can take up to 2 years to fade away.
49284
I think it could be a mental thing.  I do the same thing.  It's like I have to scratch in so many different places (mind you I actually feel the itch) before I can get comfortable and fall asleep.  It's a possibility?
429729
SOUNDS LIKE AN ALERGIC REACTION TO SOMETHING IN THE LOTION.  IF YOU USE IT AND HAVE PROBLEM'S TRY TAKING A BENADRYL PILL. IF THAT STOP'S IT THEN YOU KNOW YOUR ALERGIC TO IT.
564258
It's the release of histamine during the immune response that causes you to itch.
454407
Yes, and it makes your nether regions itch. But scratching down there is a sin. Just one of the many paradoxes of religion...
351928
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!
189830
that happens to me as well, but with ice cream, it's a reaction to sugar, the sugar gets into the blood stream, blood get's thicker and thats the itchy sensation..but i dont know how old are you but if i was you, i will be taking less sugar and more water, at least reduce 1/2% of whatever sugar you are eating or drinking
213545
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.
331823
Go back to the doctor. If you had a bacterial infection that was cured by an antibiotic, it could have killed off some of the good bacteria and left you with a yeast infection. That would cause itching and redness. Don't treat this on your own, go to the doctor, since you don't know for sure what it is.
369123
Sounds like it. You may not develop the itch right away, but I think that's how it starts. Go to the doc and if it is, you'll know for any future outbreaks so at least then you'll know so you could buy the OTC stuff.
396037
Ha Haaaaaaaaaaaa!\nOh, oh....Good one!\n\nSnooty B.itch!
282961
We itch because the infection/healing around the sore is inflamed and aggravated. But the reason you are told by your mother not to itch, is the chance of infection from dirty fingers touching a wound