20 Causes, Symptoms, Complications, and More

Redness of the attention, additionally known as bloodshot eyes, can point out the presence of a number of totally different well being points. Whereas a few of these points are benign, others are severe and require emergency medical consideration.

The redness of your eye could also be a trigger for concern. Nonetheless, most severe eye issues occur when you’ve got redness together with ache or modifications in your imaginative and prescient.

Beneath, we’ll discover the totally different causes of eye redness, how they’re handled, and when it’s a good suggestion to contact a physician.

Now let’s discover the totally different causes of eye redness. For every one, we’ll cowl what it’s, what causes it, and another extra signs to pay attention to.

Allergic reactions

Allergic reactions can have an effect on the eyes, main them to grow to be crimson and swollen. Different signs that you could be expertise embrace:

Eye allergy signs can be accompanied by different allergy signs, similar to sneezing and an itchy, operating nostril.

Some widespread allergy triggers embrace:

Dry eyes

Tears are made by small glands above the eyes. They work to assist defend and lubricate the eyes. You might have dry eyes when your eyes don’t produce sufficient tears.

Dry eyes are quite common, with research estimating a prevalence charge of between 5 to 50 p.c. The situation is extra more likely to happen in girls, folks over the age of fifty, and people who put on contact lenses.

When you’ve got dry eyes, chances are you’ll discover that your eyes seem crimson. Different signs embrace:


Conjunctivitis occurs when the membrane masking the insides of your eyelids and the white a part of your eye, known as the conjunctiva, turns into infected. This situation can be known as pink eye.

Irritation of the conjunctiva causes the whites of your eyes to seem pink or crimson in coloration. Another signs that will happen with conjunctivitis are:

  • itching
  • a burning sensation
  • feeling like one thing is in your eye
  • elevated tearing
  • discharge of mucus or pus, which might result in crusting of the eyelids or eyelashes

Conjunctivitis can have quite a lot of causes, together with:

  • viral infections, similar to these attributable to adenoviruses, measles, or COVID-19
  • bacterial infections that may be attributable to species like Staphylococcus aureus, Streptococcus pneumoniae, or Haemophilus influenzae
  • allergic reactions to issues like pollen, molds, and pet dander
  • environmental irritants like smoke or chemical fumes

Conjunctivitis attributable to a viral or bacterial an infection may be very contagious. That implies that it may possibly simply be unfold from one individual to a different.


Blepharitis is when your eyelids grow to be infected. It might probably trigger your eyelids or eyes to seem crimson and swollen.

Some extra signs of blepharitis are:

  • itching
  • a burning or stinging sensation
  • feeling like one thing is in your eye
  • elevated tearing
  • crusty eyelids within the morning
  • sensitivity to gentle

It’s additionally doable for blepharitis to trigger extra severe signs, notably if not managed. These can embrace issues like lack of eyelashes, eyelashes that develop within the improper location, or blurred imaginative and prescient.

Blepharitis can occur when you have excessive quantities of micro organism in your eyelids. The situation might also develop if oil glands in your eyelids grow to be clogged. A mite infestation can even trigger blepharitis in uncommon circumstances.


Uveitis is irritation that occurs within the center a part of your eye, known as the uvea. The uvea is an space discovered between the white of your eye and your retina.

Irritation attributable to uveitis can result in eye redness. Extra signs to look out for are:

There are a couple of recognized causes of uveitis, together with:

Getting well timed therapy for uveitis is important. It is because the situation can result in imaginative and prescient loss if not managed.


Scleritis is when irritation impacts the white of your eye, which is named the sclera. When this happens, the white of your eye can grow to be crimson and swollen. Extra signs might be:

  • elevated tearing
  • eye tenderness or ache
  • blurred imaginative and prescient
  • sensitivity to gentle
  • ache within the head, face, or jaw
  • decreased imaginative and prescient

The event of scleritis is commonly related to an autoimmune illness. Examples embrace:

It’s additionally doable for scleritis to occur attributable to an harm to the attention or a watch an infection.

Subconjunctival hemorrhage

Generally, a blood vessel in a watch can break, leaking blood on the floor of your eye That is known as a subconjunctival hemorrhage.

The situation could look severe, nevertheless it’s usually benign and goes away by itself in 1 to 2 weeks. Usually, the redness within the affected eye is the one symptom, though in some circumstances, your eye could really feel barely irritated.

Nonetheless, when you have subconjunctival hemorrhage and your imaginative and prescient is decreased, speak with a physician.

Some potential causes of subconjunctival hemorrhage are:

  • rubbing your eyes too arduous
  • intense coughing or sneezing
  • vomiting
  • eye harm

You might be extra vulnerable to this situation in case you’re taking blood thinners or have diabetes or hypertension.

Eyelid stye

A stye is a blockage of the meibomian gland within the eye that causes irritation. It might probably have an effect on the skin or within both your higher or decrease eyelid.

When you’ve got a stye, the world on the fringe of your eyelid can grow to be crimson, swollen, and painful. The affected space could fill with meibum (because of the blocked gland) and might probably develop to the dimensions of a pea.

Angle-closure glaucoma

Glaucoma is a situation the place the stress in your eye will increase because of the eye producing extra fluid than the conventional charge. This may harm your optic nerve, probably resulting in imaginative and prescient loss.

There are various kinds of glaucoma. In a single sort, known as angle-closure glaucoma, a fast enhance in eye stress happens. You may additionally see this kind of glaucoma known as closed-angle glaucoma or narrow-angle glaucoma.

The signs of angle-closure glaucoma come on instantly and will embrace eye redness. Different signs to pay attention to are:

Angle-closure glaucoma occurs when your iris blocks the world by way of which eye fluid drains. Fluid begins build up within the eye, resulting in a fast enhance in eye stress. This sort of glaucoma is an emergency and might result in imaginative and prescient loss in case you don’t search therapy straight away.

Corneal ulcers

Corneal ulcers are ulcers, or sores, that have an effect on the outer a part of your eye, which is named the cornea. This situation can be known as keratitis.

Along with crimson eyes, different signs of a corneal ulcer are:

  • extreme eye ache
  • feeling like one thing is in your eye
  • elevated tearing
  • discharge of pus
  • blurred imaginative and prescient
  • sensitivity to gentle
  • eyelid swelling

There are a number of issues that may trigger corneal ulcers to develop:

  • micro organism
  • viruses, notably herpes simplex virus and varicella-zoster virus
  • fungi
  • acanthamoeba, a kind of parasitic an infection
  • dry eyes
  • sleeping in touch lenses
  • showering or swimming in touch lenses, or utilizing properly water to scrub contacts
  • harm to the cornea, similar to a scratch, minimize, or burn
  • Bell’s palsy and different issues affecting the eyelid’s means to shut

It’s essential to hunt well timed medical consideration when you have signs of a corneal ulcer. If not managed, this situation can completely harm your imaginative and prescient.


Sustaining an harm that impacts your eye could trigger it to grow to be crimson, usually attributable to irritation or bleeding. Different signs that will happen with a watch harm are:

  • eye ache
  • swelling of the attention or the encompassing space
  • hassle transferring your eye
  • decreased imaginative and prescient
  • totally different pupil sizes

A couple of examples of widespread sources of eye accidents embrace:

  • overseas objects that get into your eye
  • bodily trauma, similar to sustaining a blow or an accident
  • publicity to chemical substances

Contact lens put on

People who put on contact lenses have to the touch their eyes and the encompassing space extra usually than those that don’t put on contact lenses. As such, they’re at an elevated threat of eye redness attributable to quite a lot of elements. A few of these embrace:

  • scratches or scrapes on the cornea
  • eye allergic reactions
  • eye infections
  • corneal ulcers, which might occur from sleeping in touch lenses
  • dry eyes
  • neovascularization, when new blood vessel develop on the cornea
  • big papillary conjunctivitis, a kind of conjunctivitis during which bumps develop beneath your eyelid
  • contact lens-induced acute crimson eye (CLARE), an inflammatory situation related to carrying contacts in a single day

Along with eye redness, some signs of problems associated to contact lenses are:

  • eye ache
  • elevated tearing
  • blurry imaginative and prescient
  • sensitivity to gentle

For those who put on contact lenses and have any of the signs above, take away your contacts for a couple of hours. In case your signs proceed or grow to be worse, contact a watch physician.

Extra causes of eye redness

Along with the causes mentioned above, some additional causes of eye redness embrace:

  • use of alcohol or hashish
  • photokeratitis, which is eye irritation that may occur attributable to solar publicity
  • ocular rosacea, a pores and skin situation that almost all usually impacts the cheeks, nostril, or brow however can even have an effect on your eyes
  • trichiasis, during which eyelashes develop inward and irritate the attention
  • cellulitis, a bacterial pores and skin an infection that may have an effect on the eyelid or eye socket
  • endophthalmitis, an an infection of the tissues on the within of your eye
  • onchocerciasis, a parasitic an infection attributable to a roundworm
  • retinoblastoma, a kind of most cancers that impacts the attention

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