Yellow and red discoloration in the whites of your eyes usually signals two different processes happening at the same time. Yellowing, known clinically as scleral icterus, typically points to an excess of bilirubin in your blood, a pigment your liver normally clears out. Redness is almost always driven by dilated or inflamed blood vessels on the eye’s surface. The two can show up independently or together, and the causes range from minor irritants you can fix in a day to systemic conditions that need medical attention quickly.
What Makes the White of Your Eye Turn Yellow
The white part of your eye, called the sclera, is packed with collagen and elastin fibers that happen to have a strong chemical attraction to bilirubin.1Avances en Interacción Humano-Computadora. Sclera Segmentation in Images for Bilirubin Level Measurement Using the U-Net Network That means whenever bilirubin builds up in your bloodstream beyond normal levels, the sclera is one of the first places to show it. Your skin can turn yellow too, but the sclera often changes color before the rest of your body because of that special affinity. This is why doctors routinely check your eyes when they suspect liver trouble or blood disorders.
Bilirubin itself is a byproduct of your body recycling old red blood cells. Normally, your liver processes it, mixes it into bile, and sends it to your intestines. If anything disrupts that chain, whether the liver itself is struggling, the bile ducts are blocked, or red blood cells are breaking down faster than your liver can keep up, bilirubin accumulates and stains your tissues yellow.
What Makes Your Eyes Red
Eye redness comes from a different mechanism entirely. The conjunctiva, the thin transparent membrane that covers the sclera and lines your eyelids, is threaded with tiny blood vessels. When those vessels dilate or become inflamed, they fill with more blood and become visible, making the eye look pink or red. This response can be triggered by infections, allergies, dryness, chemical irritants, or deeper inflammatory conditions.2PubMed Central. Ocular redness – I: Etiology, pathogenesis, and assessment of conjunctival hyperemia
The redness itself is not one condition but a shared symptom across dozens of them. A mild case might be nothing more than dry air irritating your eyes after a long flight. A more worrying case could involve infection, autoimmune inflammation, or even a sign of something happening elsewhere in your body. How you tell the difference usually comes down to accompanying symptoms: pain, discharge, vision changes, and whether one or both eyes are affected.
Common Reasons Behind Yellow Eyes
Most causes of yellow eyes fall into three broad categories: problems with the liver, problems with the bile ducts, and problems with red blood cells breaking down too quickly.
- Liver conditions: Hepatitis (viral, alcoholic, or autoimmune), cirrhosis, and fatty liver disease can all impair your liver’s ability to process bilirubin. Chronic alcohol use is a particularly common culprit. Alcoholic liver cirrhosis can also lead to vitamin A deficiency, causing additional eye surface problems beyond simple yellowing.3SpringerLink / Int Ophthalmol. Ocular manifestations of liver disease: an important diagnostic aid
- Bile duct obstruction: Gallstones, tumors, or scarring can physically block the tubes that carry bile from your liver to your intestines. When bile backs up, bilirubin spills into your blood.
- Hemolytic conditions: When red blood cells are destroyed faster than normal, your liver gets overwhelmed by the sheer volume of bilirubin. Hemolytic anemias, whether inherited (like sickle cell disease) or acquired, classically produce jaundice along with anemia and an enlarged spleen.4JAMA Internal Medicine. Acquired Hemolytic Anemia
- Gilbert’s syndrome: This inherited condition affects how your liver handles bilirubin. It is quite common, estimated to occur in roughly 5 to 10 percent of the population in many countries. People with Gilbert’s syndrome often notice their eyes look slightly yellow during periods of stress, fasting, or illness, then return to normal. It is generally considered harmless.
If your eyes have been gradually turning more yellow over weeks or months, that pattern suggests a chronic liver or blood condition rather than something acute. A sudden onset of deep yellow, especially with dark urine and pale stools, often points to a bile duct blockage and warrants urgent evaluation.
Common Reasons Behind Red Eyes
Red eyes are far more common than yellow eyes, and most of the time the cause is relatively benign. Allergies, dry eyes, and viral conjunctivitis (pink eye) account for the majority of cases you would encounter in everyday life.
Episcleritis is a less well-known cause worth understanding. It involves inflammation of the thin layer of tissue between the conjunctiva and the sclera itself. In the more common simple form, you see an intense but flat redness across one or more sections of the eye. About 30 percent of cases take a nodular form, where the redness surrounds a small, tender, movable bump.5PubMed Central. Is this a worrisome red eye? Episcleritis in the primary care setting Episcleritis is usually self-limiting, but it can recur and sometimes signals an underlying autoimmune condition like rheumatoid arthritis or lupus.
A subconjunctival hemorrhage is another common cause of dramatic redness. This happens when a tiny blood vessel on the eye’s surface breaks, and blood pools under the conjunctiva. It looks alarming, often producing a bright red patch that can cover a large portion of the white, but it is typically painless and resolves on its own within a couple of weeks. Sneezing, coughing, straining, or even rubbing your eyes too hard can trigger it.
When Yellow and Red Appear Together
Seeing both yellow and red in your eyes at the same time narrows the list of possibilities. It usually means something is going on systemically rather than just locally in the eye.
Leptospirosis is a textbook example. This bacterial infection, often contracted through contaminated water, produces a distinctive combination of high fever, yellowing of the sclera, and bilateral redness of the eyes. A case report described a 32-year-old man who presented with exactly this triad: high fever, yellow sclera, and redness in both eyes that had developed over five days. The eye redness in leptospirosis is called conjunctival suffusion and differs from typical conjunctivitis in that it involves dilation of small blood vessels without much discharge or crusting. Recognizing that combination can help doctors reach the diagnosis faster, particularly in areas where the disease is common.6PubMed Central. Bilateral conjunctival suffusion: An ocular manifestation of leptospirosis
Chronic liver disease can also produce both symptoms simultaneously. When the liver is damaged badly enough, it loses its ability to make clotting factors. This makes blood vessels throughout the body more prone to leaking or rupturing. In a study of 80 patients with chronic liver disease, about one in five developed subconjunctival hemorrhage, a rate considerably higher than what you see in the general population. The hemorrhages were more frequent than deeper retinal bleeding, because the eye’s surface vessels are thin-walled and especially vulnerable to even mild clotting problems.7European Journal of Cardiovascular Medicine. Occurrence of Spontaneous Subconjunctival and Retinal Hemorrhages in Chronic Liver Disease Patients: A Prospective Observational Study So a person with liver failure could easily have yellow sclera from high bilirubin and red patches from spontaneous bleeding, all at once.
Yellowish Spots That Are Not Jaundice
Not every yellow-looking mark on the white of your eye means bilirubin is elevated. Two extremely common growths, pingueculae and pterygia, are worth knowing about because they are frequently mistaken for early jaundice.
A pinguecula is a small, slightly raised yellowish patch that typically sits on the conjunctiva near the inner or outer edge of the cornea. It is made up of protein, fat, and calcium deposits, and it develops primarily from chronic sun exposure, wind, and dryness. It looks yellow but has nothing to do with your liver. A pterygium is a related but more aggressive growth that actually extends onto the cornea. Pterygia tend to be more vascularized than pingueculae, meaning they carry more visible blood vessels, which can make them look not just yellowish but also reddish or pink.8Cornea. Optical Coherence Tomography Angiography in Pinguecula and Pterygium
The easiest way to distinguish these from jaundice is location and pattern. Jaundice colors the entire sclera a uniform yellow, and it appears in both eyes equally. A pinguecula or pterygium is a localized spot, usually on the side of the eye closest to the nose, and it may only affect one eye. If you have a single yellowish bump rather than an overall tint, it is very likely one of these benign growths. They rarely need treatment unless they become inflamed, grow large enough to affect vision, or cause persistent discomfort.
Contact Lenses, Screens, and Environmental Triggers
If you wear contact lenses and your eyes are chronically a bit red, the lenses themselves may be the reason. Research has shown that even routine, uncomplicated contact lens wear produces a low-grade inflammatory state on the eye’s surface. This “para-inflammation” keeps the eye’s immune defenses on alert and is generally considered protective rather than harmful, but it can make your eyes look persistently redder than they would otherwise.9Wiley Online Library. Contact lens wear is intrinsically inflammatory If you add dry office air, long screen time, and inconsistent lens cleaning to the mix, that background redness can become quite noticeable.
Prolonged screen use contributes to redness through a simpler mechanism: you blink less. When you are focused on a screen, your blink rate can drop by half or more, which lets the tear film evaporate and leaves the surface exposed. Dry patches on the conjunctiva trigger the same vasodilatory reflex that produces redness in other inflammatory conditions. The fix is boring but effective: blink deliberately, use preservative-free artificial tears, and take breaks from the screen.
Smoke, chlorine, air pollution, and very dry or windy environments can all irritate the conjunctiva in the same way. If your eyes are red every time you walk into a particular building or after spending time outdoors on a windy day, the environment is the most likely explanation.
Alcohol, Medications, and Lifestyle Factors
Alcohol affects both the redness and yellowing sides of the equation. In the short term, drinking dilates blood vessels throughout your body, including the ones on the eye’s surface, which is why your eyes can look bloodshot after a night out. In the long term, heavy drinking damages the liver, reducing its capacity to process bilirubin and eventually producing the jaundice seen in alcoholic hepatitis or cirrhosis.
Certain medications can also contribute. Drugs that are processed by the liver, including some antibiotics, anti-seizure medications, and acetaminophen in high doses, can cause drug-induced liver injury that raises bilirubin levels. On the redness side, some eye drops marketed as redness relievers can actually make chronic redness worse through a rebound effect: the decongestant shrinks blood vessels temporarily, but when it wears off, the vessels dilate even more than before. Using these drops daily for weeks can leave your eyes redder than they were when you started.
Smoking is worth mentioning separately. It increases the risk of pinguecula and pterygium development by irritating the eye’s surface chronically, and it also impairs blood flow throughout the body, which can worsen the appearance of both redness and yellowing.
When to Get Your Eyes Checked Promptly
Most instances of mild redness will resolve with simple measures: rest, hydration, removing contact lenses for a day, or avoiding whatever irritant triggered it. Yellowing, however, almost always warrants a medical evaluation because it implies something is happening with your liver or blood that a simple eye rinse will not fix.
Seek prompt evaluation if you notice any of the following:
- Yellow sclera in both eyes: This is jaundice until proven otherwise. Even mild, uniform yellowing deserves a blood test to check your bilirubin and liver enzyme levels.
- Redness with pain or vision changes: Painless redness is usually benign. Redness accompanied by significant pain, sensitivity to light, or blurry vision could indicate conditions like acute glaucoma, uveitis, or a corneal ulcer, all of which need urgent attention.
- Yellow eyes plus dark urine: This combination strongly suggests a problem with bile flow, either from the liver itself or from an obstruction downstream.
- Redness that does not resolve in two weeks: If artificial tears, avoiding irritants, and removing contact lenses have not cleared the redness after a couple of weeks, something more persistent is at play.
- Both yellow and red at once: As discussed, this combination raises the possibility of systemic disease and should not be dismissed as two unrelated cosmetic issues.
How Doctors Figure Out the Cause
If you go in with yellow or red eyes, the workup will depend on which color is dominant and what other symptoms you have. For yellowing, a basic blood panel measuring bilirubin (both direct and indirect fractions), liver enzymes, and a complete blood count will usually point toward whether the problem is the liver, the bile ducts, or the red blood cells. An ultrasound of the abdomen may follow to look for gallstones, tumors, or structural liver changes.
For redness, the evaluation is usually more hands-on. Your doctor or ophthalmologist will look at the pattern of redness under magnification, check your eye pressure, and examine the deeper structures with a slit lamp. Whether the redness is diffuse or sectoral, superficial or deep, unilateral or bilateral, and whether it blanches with certain eye drops all help narrow the diagnosis. In cases of episcleritis, for instance, applying a vasoconstrictor drop will blanch the superficial redness while leaving the deeper episcleral vessels still visible, a useful trick that separates it from simpler conjunctival inflammation.
For people with chronic liver disease who show up with both yellow and red eyes, the eye findings themselves can serve as a marker of disease severity. The study of 80 chronic liver disease patients found that those with more severe coagulopathy were more likely to develop spontaneous hemorrhages in the eye, meaning the eye can function as a kind of window into how well the blood is clotting overall.7European Journal of Cardiovascular Medicine. Occurrence of Spontaneous Subconjunctival and Retinal Hemorrhages in Chronic Liver Disease Patients: A Prospective Observational Study It is one of the more literal examples of the eyes revealing what is happening inside the rest of the body.
Newborns and Children
Yellow eyes in newborns deserve a separate mention because the context is entirely different from adults. Neonatal jaundice is extremely common, occurring in a majority of healthy newborns during the first week of life. It happens because a baby’s immature liver has not yet ramped up its bilirubin-processing capacity, and the baby is rapidly breaking down fetal hemoglobin it no longer needs. In most cases it peaks around day three to five and resolves on its own or with phototherapy.
However, jaundice that appears within the first 24 hours of life, persists beyond two weeks, or is accompanied by very high bilirubin levels can indicate something more serious, including blood type incompatibility between parent and baby, inherited hemolytic conditions, or biliary atresia (a blockage of bile ducts that requires surgical intervention). Pediatricians screen for bilirubin levels before a newborn leaves the hospital precisely because the stakes of missing a severe case are high.
Red eyes in newborns are less common but can occur from birth trauma, a blocked tear duct, or infection acquired during delivery. Any redness in a newborn’s eyes that is accompanied by discharge or swelling should be evaluated promptly, since neonatal conjunctivitis from certain bacterial infections can progress quickly and threaten vision if left untreated.