Dehydration

• Dehydration is one of the main causes for low blood pressure. Dehydration can be a result of exercise and not drinking enough water while exercising.
  
  

Inflammation of Organs

• When the body's organs are severely inflamed, blood pressure can drop as a result of this inflammation. Medical conditions such as acute pancreatitis deplete the body of a normal blood flow and cause low blood pressure.
  
  

Bleeding

• Moderate to severe bleeding can deplete the body of much needed blood flow. As a result, moderate to severe bleeding as a result of ulcers or diverticulosis can cause low blood pressure.
  
  

Weakened Heart Muscle

• Low blood pressure can also happen as a result of a weakened heart muscle. When a person has a heart attack, their blood pressure can be very low as a result of the strain put on the heart.
  
  

Slow Heart Rate

• A slow heart rate (bradycardia) can also attribute to low blood pressure. Bradycardia decreases the amount of blood pumped by the heart which results in low blood pressure.