Wikipedia’s entry on itching goes as follows:
Itch is a sensation that causes the desire or reflex to scratch. Itch has resisted many attempts to classify it as any one type of sensory experience. Modern science has shown that itch has many similarities to pain, and while both are unpleasant sensory experiences, their behavioral response patterns are different. Pain creates a withdrawal reflex while itch leads to a scratch reflex.
My own scratch reflex has been horribly over-employed these last two nights. I wonder if it has anything to do with a change of climate, being currently in a temperate dry place rather than the cold wet place where I normally reside? I came here to do some work, and while I have managed to do a fair bit of writing, I have probably done just as much scratching, often in the more personal or inaccessible zones of the body. I haven’t scratched like this since having scabies a long time ago.
The doctor back home told me it might be a side-effect of the medication I am on (great, I thought, another side effect to go with the fatigue, loss of appetite, anaemia, depression and rage). He also told me – get this – to try not to scratch.
Well, as you can imagine, I laughed like a cretin, since the very essence of having an itch is – as the Wikipedia entry makes clear – to activate the scratch reflex. You think, I’ll just give it a little scratch, and the next thing you are at it like a monkey. When you use your fingernail to scratch the spot where the irritant is, you not only remove the irritant but you irritate a whole shedload of other nerve endings. This means your itch itches more, hurts more, and you consequently scratch more. So my doctor’s advice was actually very helpful, if only I was able to heed it.
All I could do last night was take a valium and keep my hands clenched together under the pillow, in an attempt to exercise the kind of self-control that would do credit to a monk dedicated to obliterating the demands of the flesh.
There is, I suspect, a literary aspect to this scratching business. In fact the whole thing reeks of metaphor, if only because writing itself at times resembles an act of scratching. Initially one writes in order to relieve an itch. However once the process has begun, the initial itch is replaced by something quite monstrous. Then we find it impossible to stop scratching. I wonder if this has anything to do with being on the seventeenth draft of a novel?