why is belly button fluff blue?
149459
Were you wearing a new blue shirt?
504507
"The umbilical cord is the life-line that attaches the placenta to the fetus. The umbilical cord is made up of three blood vessels: two smaller arteries which carry blood to the placenta and a larger vein which returns blood to the fetus."\n\nSince the umbilical cord only houses arteries, it wouldn't look like much on the inside.  \nIn fact, surgeons often operate through the belly button to minimize scaring for the patient...so it can't be complicated behind it...I assume it's just a scar there, and once the arteries were no long needed, they emptied and that was all.
461959
It is blue when the blood does not have oxygen in it.  Once blood is drawn though, it hits the oxygen and turns red.
387736
neither have belly buttons?
381940
Umbilical hernia, infection, bowel obstruction, ascites (a collection of fluid) in the abdomen, Endometriosis...could be a number of things.  Other symptoms should help your doctor narrow it down (for example, is there discharge from the umbilicus, does it occur in relation to your menses, do you have a history of GI issues, is the umbilicus blue-tinged, etc. etc...).  It's also important to be re-checked for appendicitis, as that could be a misdiagnosis the first time around (it happens).\n\nBased on your additional comment, I'm even more inclined to think appendicitis.  Umbilical pain w/diarrhea are hallmark symptoms...is the pain moving to the right or shifting in any way?  Is it constant, or does it subside?\n\nI'd get a second opinion if I were you.  The worst that can happen is that you spent time getting another opinion that said it wasn't appendicitis too...but at least you'll be safer knowing.\n\nGood luck and feel better.
157272
It very well may be surface only discoloration...buff an area and see.Just because it blued a little is no reason to think it is contaminated deeper. The blueing is oxadation due to the heat.
897481
I think its because when we are formed our belly button is were our mums inbirical cord was canected to us. and if ur then wondering why some people have ini and outie belly buttons its beacause of were the doctor cuts the cord. :)
963165
It could be something very benign, or it could be a signal of something more sinister.  It is impossible for us to tell you why without listening to his heart.\nThere is a very distinct way a "normal" heart should sound - and your pediatrician is well trained to hear these "normal" and "abnormal" sounds.  Take him to the doctor and make sure you tell him of your concerns.\nAlso, tell the doctor of any other signs or symptoms.  Does he turn blue?  Hiccup?  Get dizzy or pass out??\n\nBrainstorm and think of anything you can tell your doctor about your son's behavior.  It may be nothing...but it helps to err on the side of caution and let the doctor investigate
450893
Food Coloring is sprayed in the air constantly making it appear blue.
410647
It's really blue. Because you see it as blue.
1008421
awwwwww..how cute! u cant see the belly button cuz of the fur. LOL. cute. =p
495753
Light blue, because it's a nice light color that doesn't show through. and it' cute.
896650
I don't think the two things are related. The bellybutton has to be from something else, maybe you got poked with something while you were sleeping?  I had my gallbladder out with the laproscopic surgery 12 years ago and it was really, really easy.  I felt great right afterwards, almost no pain.  My only regret was that I waited too long to have the surgery because I was afraid and suffered alot of painful attacks! Good luck to you.
1182840
Your belly button leaks.
431900
There are no muscles below the belly button.  Pressure on that location will result in a puncture and all the air will come out.
1112841
If you meant they have a line about 2 inches below their belly button it could simply be that's where their pants or shorts sit.  People who wear pants or shorts there are a little tight on them when they sit down or even when standing will get a line affect on them.
249655
belly button.. very cute and summer is coming up