Pernicious anemia

Updated: 2023-08-18

Description

A decrease in red blood cells that happens when the body can't absorb enough vitamin B-12.

Overview

Pernicious anemia is a decrease in red blood cells that occurs because the body can't absorb enough vitamin B-12. Common causes include a weakened stomach lining or an autoimmune condition.

Symptoms

Symptoms include fatigue and weakness. Untreated pernicious anemia can cause heart and nerve damage.

Treatments

Treatment involves vitamin B-12 shots or pills.