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- Path: sparky!uunet!gatech!mailer.cc.fsu.edu!sun13!sun16.scri.fsu.edu!mayne
- From: mayne@sun16.scri.fsu.edu (Bill Mayne)
- Newsgroups: rec.scuba
- Subject: Re: Diving headaches
- Message-ID: <10025@sun13.scri.fsu.edu>
- Date: 30 Jul 92 14:24:28 GMT
- References: <1992Jul30.021402.20788@nuscc.nus.sg>
- Sender: news@sun13.scri.fsu.edu
- Reply-To: mayne@sun16.scri.fsu.edu (Bill Mayne)
- Organization: SCRI, Florida State University
- Lines: 33
-
- In article <1992Jul30.021402.20788@nuscc.nus.sg> ccechk@nuscc.nus.sg (Heng Kek) writes:
- >I'm a relatively new diver (NAUI OW1 Apr92) and experience headaches
- >when I'm down after a while. I've been told by an assistant
- >instructor that it is because I tend to hold my breath. Well, I DO
- >try to breathe slowly and may unconsciously hold my breath at times.
- >
- >But my question is, how does holding one's breath underwater while
- >scuba-diving cause headaches?
- >
- >I imagine it would have something to do with Nitrogen in the blood.
- >Any enlightenment would be most appreciated.
-
- I doubt it has anything to do with nitrogen. CO_2 is a possibility,
- as someone has already suggested. The danger of holding your breath
- has already been pointed out, too. Some other possibilities which
- aren't related to your breathing are cold, sinus problems, and tension.
- You would probably recognize sinus headaches brought on by pressure
- changes. These tend to be worst after surfacing. They might not be as
- extreme as sinus squeezes. Since your problem which starts after you have
- been down a while and while you are still at depth I don't think sinuses
- are the main cause.
-
- I've noticed that when I dive with my head back, as I sometimes
- have to do to look where I'm going in small cave passages (Don't
- do this without cave training) I tend to get headaches which I
- attribute to muscle tension. You could encounter the same thing
- in open water, especially if you are often in a slightly head down
- position or looking forward instead of down when in a good horizontal
- position. Being aware of this I've been able to reduce the problem
- by consciously working on it. Rolling my head around a little to
- help relax when I notice tension helps.
-
- Bill Mayne
-