Why is this happening?
819224
If it continues, I would either go back to your doctor or to another one for a second opinion.  It can be related to low blood pressure or blood loss.  It can also be caused by other more serious troubles too.  Your doctor can help sort this all out.
1099852
I don't know but the same thing is happening to my computer. So I'm going to stay posted on your question to see if anything helps.
275546
This could possibly be several things, and it may depend on when it happens. Possibly an ulcer? You should seek medical advice if this persists. Best of luck.
392740
Why is this question asked like 3 times in a row?
137084
What your question is messed up...i cant understand it
146917
It's crises.\n\n...I really need to stop earning points and start getting back to work on my English paper...but oh well...  :D
466032
That happens at times when you become pregnant. It could be preparing you for breastfeeding. Just ask your doctor and he will know exactly why.
323897
Why your question has making no sense?
102979
No. something is wrong.
594914
weirdness.. what is the question????
582325
Because it doesn't make sense.\n\nRock on!\n\nHave a great godless day!  Contact me with your questions, comments, or concerns.
321445
He may be using a calling card for this purpose, i suppose.\n\nI had a similar problem, and then found out a similar reason
981116
There are many reasons:\nCheating\nlying\nabuse
459714
Could be because the room was full.  This is typicaly the cause, so wait a bit and try again.  There are other technical issues that could interfere, but they are less common and would require more information to diagnose.
614922
has it been happening long?  have you added HW recently?  what OS are you running?\n\nthese things are always helpful and I can answer with some different views than you have received already...
906086
It happens.    Relax.\n\n_
427543
This can happen normally if you are cold and a chill runs through you. Sometimes it's just something spontaneous even if you aren't cold. But if it's somethign that happens all the time, I don't know what it could be.