Causes of Sudden Drop in Blood Pressure?

Sudden drops in blood pressure can be life-threatening. Causes of this type of hypotension include:

• Loss of blood from bleeding
• Low body temperature
• High body temperature
• Heart muscle disease causing heart failure
• Sepsis, a severe blood infection
• Severe dehydration from vomiting, diarrhea, or fever
• A reaction to medication or alcohol
• A severe allergic reaction, called anaphylaxis