Font Size

Low Blood Pressure (cont.)

Low Blood Pressure and Intravascular Fluid

The fluid space within the blood vessels is made up of blood cells and serum (water, clotting factors, chemicals, and electrolytes).

  • Dehydration, the loss of water, decreases the total volume in the intravascular space (inside the blood vessels). This can be seen in any illness with increased water loss. Vomiting and diarrhea are visible signs of water loss.
  • Bleeding decreases the number of red blood cells in the blood stream and leads to a decreased amount of fluid in the intravascular space and low blood pressure.
Medically Reviewed by a Doctor on 9/28/2016

Must Read Articles Related to Low Blood Pressure

Fainting Fainting or syncope, is a temporary loss of consciousness. Causes of fainting include:
  • vasovagal,
  • situational,
  • postural,
  • ...
learn more >>
Severe Allergic Reaction (Anaphylactic Shock)
Severe Allergic Reaction (Anaphylactic Shock) The severe reaction of anaphylaxis is an immune allergic response that is life-threatening. The symptoms are breathing problems, learn more >>

Patient Comments & Reviews

The eMedicineHealth doctors ask about Low Blood Pressure:

Low Blood Pressure - Allergic Reaction

Has an allergic reaction ever caused your blood pressure to drop?

Low Blood Pressure - Treatment

What was the treatment for your low blood pressure?

Low Blood Pressure - Causes

What caused your blood pressure to be abnormally low?

Low Blood Pressure - Symptoms

Which low blood pressure symptoms (dizziness, lightheadedness, fainting) do you find most troubling?

Read What Your Physician is Reading on Medscape

Shock, Distributive »

Shock is defined as a clinical syndrome due to inadequate tissue perfusion that results in end-organ dysfunction.

Read More on Medscape Reference »

Medical Dictionary