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Subconjunctival Hemorrhage (Bleeding in Eye)

Subconjunctival Hemorrhage Overview

The conjunctiva is the thin, moist, transparent membrane that covers the white part of the eye (called the sclera) and the inside of the eyelids. The conjunctiva is the outermost protective coating of the eyeball.

The conjunctiva contains nerves and many small blood vessels. These blood vessels are usually barely visible but become larger and more visible if the eye is inflamed. These blood vessels are somewhat fragile, and their walls may break easily, resulting in a subconjunctival hemorrhage (bleeding under the conjunctiva). A subconjunctival hemorrhage appears as a bright red or dark red patch on the sclera.



Next: Subconjunctival Hemorrhage Causes »

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Subconjunctival Hemorrhage (Bleeding in Eye)

Coughs Overview

A cough is an action your body takes to get rid of substances that are irritating to your air passages, which carry the air you breathe in from the nose and mouth to the lungs. A cough occurs when special cells along the air passages get irritated and trigger a chain of events. The result? Air in your lungs is forced out under high pressure. You can choose to cough (a voluntary process), or your body may cough on its own (an involuntary process).

Causes of Coughs

The list of possible causes of cough is long and highly varied. Doctors classify coughs into 2 categories, acute and chronic. Many doctors define an acute cough as one that been present for less than 3 weeks. Chronic coughs are those present for more than 3 weeks.

  • Acute coughs can be divided into infectious (caused by an infection) and noninfectious causes.
  • Infectious causes of acute cough include viral upper respir...

Read the Cough article »



Read What Your Physician is Reading on eMedicine

Subconjunctival Hemorrhage »

Subconjunctival hemorrhage is defined as blood between the conjunctiva and the sclera, and it is involved in the differential diagnosis of a red eye.

Read More on eMedicine »

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