My periodontist told me that I have a tooth whereby root resobtion is
taking place. He indicated that while this condition has been
progressing for some time it seems recently to have gotten worse. My
questions to this group is;

=> Currently, I can not feel any discomfort in that tooth - what will
be the signs that something needs to be done fast?

If you're going to have the tooth extracted anyway, you probably don't
need to do anything about it right away, since there is no pain or
infection.  If you want to save the tooth, if it is salvageable,
you would want to do a root canal procedure on the
tooth ASAP, or have a calcium hydroxide material placed in it to help
stop
the root resorbtion.  Hard to say what the best option is without an
X-ray.

=> What symtoms might I come across next in that tooth?

It depends on why is there root resorption.  If it is due to infection,
you could in theory have a blow-up of the infection, giving a lot
of pain and discomfort.  If it is a non-infectious process that is
causing the root resorbtion, you would expect the root resorbtion
to proceed, which may lead to weakening or loosening of the tooth.
Hard to tell without an x-ray, though.

=> Will I experience pain or will the tooth just fall out (like my
8-year old does when she loses a tooth)?

The tooth may or may not fall out.  If there is no infection, probably
there will be no pain.

=> Are there any activities I should not do (such as rifle or shotgun
shooting) which could cause the resorbtion to move more rapidly?

No one knows exactly why root resorption takes place.  To my
knowledge there is no activity that slows down or accelerates root
resorption.  Certainly rifle or shotgun shooting has nothing to do
with it.

=> I am having that tooth extracted in 1 month - if I am feeling no
discomfort/looseness in that tooth what are the chance of it staying
put for 1 month?

If there is no infection it could be without symptoms for years.

--Johhny

disclaimer: this should not be construed as official medical or dental
advice.  no assurance is offered of the truth or practicality of this
advice.  advice may require modification depending on the actual
clinical or x-ray data associated with the scenario proposed by the
questioner.  use at own risk.  not responsible for lost, missing or
destroyed teeth as a result of using this advice, even if informed
ahead of time of the possibility of such loss.  have fun.