19
Apr
The reasons for scratching?
I mean besides to take care of an itch. It seems likely that the cause of an itch is often some external irritant so scratching might elliminate that irritant or bring your attention to it. What I noticed the other day though as I was having an allergic reaction is that scratching increases blood flow to that area. So perhaps another reason is to get blood to the area so white blood cells can deal with anything that needs to be dealt with.