What could be causing this?
138967
Any number of things, from common cold to a tumor. If it's been going on for 2 weeks, it's probably on the more serious end of the spectrum, and he should seek professional medical attention right away.
292252
I've heard that too many vitamins can cause this to happen.  But you should contact a dr or pr.
205277
Intestinal parasites. Also lots of different diseases could be responsible. See a doctor!
393970
It might be that maybe your settings need to be reset.
353279
Could be a bad monitor - sometimes that happens.\nOr there could be something that's causing interference such as a cell phone charging nearby, a fan running etc...
499871
An allergy perhaps?  Hayfever?
460512
There might be a medical reason for it, so see a doctor to be safe.
118440
can be caused by any number of things if anything on or in brain MRI should find it good luck
554755
GO SEE A DOCTOR AS SOON AS YOU CAN...YOU MAY HAVE SOMETHING!
64277
It could be any one of a thousand reasons. It would be necessary to examine the particular site in question to determine the exact cause.  Read through this free tutorial http://www.seo-blog.com/tutorial.php or ask an experienced SEO.
534229
Could be.\n\nTry rebooting the system. That might help.
519736
could be nothing more than irritation from barometric changes. there my be nothing you can do for it. it could also be ecxima
452729
hmmm....there could be many reasons why this is happening. It could just be the way your system works, or it could be a medical problem like overactive thyroid or even Crohn's disease.  Please make an appointment with your doctor and discuss this with him/her.  It's probably nothing, but they're the health care professionals and this is their field of expertise.  I would strongly recommend finding out why this happens to you.
449110
You may want to ask your doctor what is wrong. He could help you.
107076
Could be any of the above. Consult a physician ASAP
126257
possibilities include:\nvirus, trojan , malware etc.\nsystem admin changed some settings.
181476
may be a proxy on your network cause it,or in your firewall, some settings.