Low blood pressure causes

Low blood pressure causes can be due to hormonal changes, widening of blood vessels, medicine side effects, anemia, heart & endocrine problems.

Athletes and people who exercise regularly tends to have lower pressure than do people who aren't as fit. But in some instances, low blood pressure can be a sign of serious, even life-threatening disorders.

Possible causes of low blood pressure

Causes of low blood pressure may be due to pregnancy, medications, heart problems, endocrine problems, dehydration, blood loss, severe infection, allergic reaction and nutritional deficiencies.

Low blood pressure cause by pregnancy
Because a woman's circulatory system expands rapidly during pregnancy, blood pressure is likely to drop. In fact, during the first 24 weeks of pregnancy, systolic pressure commonly drops by five to 10 points and diastolic pressure by as much as 10 to 15 points.

Low BP cause by medications
 Many medication drugs can cause low blood pressure, including

• diuretics and other drugs that treat high blood pressure;
• heart medications such as beta blockers;
• drugs for Parkinson's disease;
• tricyclic antidepressants; sildenafil (Viagra), particularly in combination with nitroglycerine; narcotics; and alcohol.
• Some over-the-counter medications can cause low blood pressure when taken in combination with medications used to treat high blood pressure.

Causes of Low blood pressure - heart problems
Some heart conditions that can lead to low blood pressure include extremely low heart rate (bradycardia), heart valve problems, heart attack and heart failure. These conditions may cause low blood pressure because they prevent the body from being able to circulate enough blood.

Low BP cause by endocrine problems
An under-active thyroid (hypothyroidism) or overactive thyroid (hyperthyroidism) can cause low blood pressure. In addition, other conditions, such as adrenal insufficiency (Addison's disease), low blood sugar (hypoglycemia), and in some cases, diabetes, can trigger low blood pressure.

Low blood pressure cause by dehydration
When one becomes dehydrated, the body loses more water than it takes in. Even mild dehydration can cause weakness, dizziness and fatigue. Fever, vomiting, severe diarrhea, overuse of diuretics and strenuous exercise can all lead to dehydration. Far more serious is hypovolemic shock, a life-threatening complication of dehydration. It occurs when low blood volume causes a sudden drop in blood pressure and a corresponding reduction in the amount of oxygen reaching your tissues. If untreated, severe hypovolemic shock can cause death within a few minutes or hours.

Low BP cause by blood loss
Losing a lot of blood from major injury or severe internal bleeding reduces the amount of blood in the body, leading to a severe drop in blood pressure.

Low blood pressure cause by severe infection
Septicemia can happen when an infection in the body enters the bloodstream. Lung, abdomen or urinary tract infections are usually the cause of septicemia. These conditions can lead to a life-threatening drop in blood pressure called septic shock.

Hypotension cause by allergic reaction
Anaphylaxis is a severe and potentially life-threatening allergic reaction. Common triggers of anaphylaxis include foods, certain medications, insect venoms and latex. Anaphylaxis can cause breathing problems, hives, itching, a swollen throat and a drop in blood pressure.

Hypotension cause by nutritional deficiency
A lack of the vitamins B-12 and foliate can cause anemia, a condition in which your body doesn't produce enough red blood cells. In addition to making you feel tired because you're not getting enough oxygen, anemia can lead to low blood pressure.