Pernicious anemia
Pernicious anemia is caused due to the deficiency of vitamin B 12. In this disease the body becomes incapable of absorbing Vitamin B 12 due to the absence of intrinsic factors. Vitamin B 12 is not produce the human body so it has to be obtained from the diet. The post often observed symptoms of this disease are fatigue, low blood pressure, rapid heartbeat, pallor, shortness of breaths, cognitive impairment, pain, diarrhea, swollen red tongue. The person suffering from this disease might even suffer from jaundice due to malformation of blood cells in the body. Pernicious anemia also affects the functioning of the nervous system.