Is it a emergency when redness all of a suddenly appears in one of your eyes?
924482
it could be acute closed angle glaucoma ,\nwhich is a medical emergency because you could lose sight in that eye .\n\nusually  it is accompanied by \n-tummy pain\n-eye pain, the eye ball is hard like a rock.
405005
go to the doctor immediately
741090
If they form in a cicle around the coloured part of your eye - get a cholesterol test as they can be a sign of hypercholesterolaemia.  \n\nYou should  always  see your optician/opthalmologist/doctor about any unusual condition.
132873
It could be an allergy.  Does it only happen when you read?  If so, you may need reading glasses.  It doesn't sound like anything too serious, but make an appointment with your eye doctor to find out what the cause is.
128071
How long has this part of your eye been brown?  If it's been this way your entire life, then it's probably just some extra pigment.  If you just noticed it, you should see your eye doctor as soon as you can to rule out more serious conditions.
469729
red veins across the white of your eyes are fine, BUT, if the vein goes into the pupil of your eye you got problems.\n\nPS it should be fine if it goes right up to the pupil and not beyond it. But go get it checked out anyways.
206681
Red-eye is a phenomenon that happens only when taking photos using a flash. When taking photos in day light or when in high ambient light scenarios people’s eyes look normal. When taking pictures in low ambient light scenarios using a flash the result many times is redness in the people’s eyes.\n\nThe reason for the color red is simple – when flash light from the camera hits the eyes it penetrates and is reflected back from the retina. The color of the reflected light is red because the light is actually reflected from the red blood in the retina.\n\n(To read more, click the link below.)
104871
If I were you, I go see a doctor now. It is not a good thing to have red spots in the mouth area. Better be safe than be sorry later.
507657
dont be worried a lot. that usually happens but of course u should see a doctor immediately.
341409
not common see a doctor for this as quick as you can ?
120663
Red eye occurs with both digital and film cameras. The cause of red eye is having the flash too close to the camera lens.\n\nWhat you are seeing is the flash reflecting off the blood vessels in the retina, on the back of the eye. If the flash is moved further away from the lens, the light enters the eye at an angle and isn't reflected straight back to the camera.\n\nBecause digital cameras tend to be smaller than film cameras, their flashs are closer to the lens, so this problem  is more likely occur.
395459
Visine and other eye drops have formulas to get the redness out and getting adequate sleep always helps but, it might be wise to find the source of the problem so that any health concerns are dealt with A.S.A.P.
63182
Itching is the cardinal sign of eye allergies.  The ER is an okay option, but I would suggest making an appointment with an optometrist or ophthalmologist.  If you explain the situation, they will be able to get you an immediate appointment (if necessary).
427086
You need to see your eye doctor immediately.  Stress will not cause sharp bursts of pain behind your eyes.  Be proactive about this - it's much better to be safe than sorry.
1152463
the swelling could be caused by any number of medical conditions, but the most common causes are either pinkeye(conjuctivitis) or having a sty on your eye. If your eye is red and matted together when you wake up, this could be pinkeye. If this is the case you need to contact your doctor and have it checked out. If it is a sty, there is really not much you can do, except put warm compresses on it.
508032
You need to see a doctor asap
650011
That is normal for your eye to do so every once in a while, so I wouldn't worry about it. I think it is funny every time my eye does, it feel funny and weird.