Some fruits cause my mouth to bleed (small pimples).
I was told it is an allergy.

I forget the specific mechanics but apparently it is the kind of
allergy that you are predisposed to but which certain childhood
exposures combine with the predisposition (which I vaguely recall to
be a certain gamma immunoglobulin). Which means that if my mouth
bleeds from apples my cousin in another part of the world would have
the exact same response to a totally different fruit.

                   - = -
  Vasos-Peter John Panagiotopoulos II, Reagan Mozart Pindus BioStrategist
      http://ourworld.compuserve.com/homepages/vjp2/vasos.htm
 ---{Nothing herein constitutes advice.  Everything fully disclaimed.}---
       [Ignore webs which don't work with http://lynx.browser.org/]
    [Regulation begets corruption] [Urb Sprawl confounds terror]
  [Homeland Security means private firearms not lazy obstructive guards]

PS, what I do when it
itches is "grunt like a pig".
It relieves the itch.
And yes, it sounds like allergy.

                   - = -
  Vasos-Peter John Panagiotopoulos II, Reagan Mozart Pindus BioStrategist
      http://ourworld.compuserve.com/homepages/vjp2/vasos.htm
 ---{Nothing herein constitutes advice.  Everything fully disclaimed.}---
       [Ignore webs which don't work with http://lynx.browser.org/]
    [Regulation begets corruption] [Urb Sprawl confounds terror]
  [Homeland Security means private firearms not lazy obstructive guards]