What causes a red spot on the eye?

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What causes a red spot on the eye?
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The conjunctiva is the transparent membrane that
covers the surface of the eye. The conjunctiva
contains tiny blood vessels that can break or
leak after sudden increases in pressure. In this
article, learn more causes red spots on the eyes
and how to treat them.
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Causes A red spot on the eye, or subconjunctival
hemorrhage, usually occurs as a result of
increased blood pressure. In some cases,
subconjunctival hemorrhages can appear without
any identifiable cause. A person might not
realize they have a subconjunctival hemorrhage
until they look in a mirror. Common causes of a
red spot on the eye include

• sneezing
• coughing
• vomiting
• excess physical strain
• injury to the eye
• irritation or allergic reactions
• rubbing the eye too hard
• infections

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Rare causes of subconjunctival hemorrhages
include

• high blood pressure
• taking blood thinners
• medical disorders that cause bleeding
• diabetes

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Diabetic retinopathy Diabetic retinopathy can
also lead to a red spot on the eye. This occurs
when blood vessels in the eye break due to high
blood sugar levels. Blood from broken or leaking
vessels can cause floaters or dark spots in the
vision. People may not realize they have diabetic
retinopathy until it affects their vision.

• Symptoms of diabetic retinopathy include
• floaters
• blurred vision
• reduced night vision
• seeing colors that appear faded

People who have diabetes can reduce their risk of
developing diabetic retinopathy by controlling
their blood sugar and blood pressure levels. If
a person is experiencing diabetic retinopathy,
they may wish to speak to a doctor about ways to
manage underlying diabetes.
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Treatment
Subconjunctival hemorrhages do not usually
require treatment. The healing time can vary from
a few days to a few weeks, depending on the size
of the spot.
People can use artificial tears to relieve
irritation or dryness. Artificial tears are
available in drug stores, pharmacies, and online.
A doctor may prescribe antibiotic eye drops if
the red spot is the result of a bacterial
infection.
People should not be alarmed if the red spot
changes colors from red to yellow or orange. This
is a sign that the hemorrhage is healing. Like a
bruise, it may slowly fade over time.
Treatments for diabetic retinopathy include

• injectable medications to reduce swelling
• laser eye surgery to close leaking blood vessels
• vitrectomy, or surgery that involves removing
  vitreous gel and blood from the back of the eye

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Summary
Although it may look alarming, a red spot on the
eye is likely to be a subconjunctival hemorrhage.
Typically, subconjunctival hemorrhages do not
require medical treatment, and they will not
affect a persons vision.
People should see a doctor if they experience
pain, impaired vision, or discharge coming from
the eye that the red spot is affecting.
Diabetic retinopathy may also cause a red spot on
the eye. People who have diabetes can speak with
a doctor if they notice any changes in their
vision, such as floaters or blurring.
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