What is pernicious anemia?
A person with pernicious anemia has a reduced number of red blood cells in the bloodstream, due to a lack of vitamin B-12. Pernicious anemia is caused by decreased levels of intrinsic factor, which is an enzyme that helps the body absorb vitamin B-12. The average age of onset for pernicious anemia is 60 years.

What are the symptoms of pernicious anemia?
Symptoms of pernicious anemia include dizziness, faintness, fatigue, pale skin, palpitations, tingling of the hands, tongue swelling, weight loss, and difficulty breathing with exertion. Additional symptoms may include confusion and loss of balance or coordination.

How does the doctor treat pernicious anemia?
Treatment for pernicious anemia includes vitamin B supplements and a healthy diet.