2. Types of Edema

Three types of edema are named for the location in which they occur:

  • Pedal edema occurs when fluid builds up in the feet and lower legs, which is most common in pregnant women, people who stand or sit for long periods of time, and older individuals.
  • Macular edema is excess fluid in the macula or center of the retina in the eye. It occurs when blood leaks from damaged vessels in the retina.
  • Cerebral edema is severe and occurs when fluid gathers in the brain. It can happen for many reasons, such as a blocked blood vessel, tumor, allergic reaction, or head trauma.


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