Pernicious anemia is an autoimmune condition resulting in an immune attack against cells in the stomach that produce intrinsic factor, a protein needed for the absorption of vitamin B12. This leads to vitamin B12 deficiency which can lead to neurological concerns. 

Symptoms may include:

• Bleeding gums
• Diarrhea
• Fatigue
• Impaired sense of smell
• Loss of deep tendon reflexes
• Loss of appetite
• Pallor
• Personality or memory changes
• Positive Babinski's sign
• Rapid heart rate
• Shortness of breath
• Sore mouth
• Tingling and numbness of hands and feet
• Tongue problems
• Unsteady gait, especially in the dark
• Other neurological problems

If your CBC test shows elevated MCH and normal/elevated MCHC, consider testing intrinsic factor antibodies, methylmalonic acid and homocysteine levels.