Vitamin B12 Deficiency

! Seek urgent medical care if warning signs appear

Some health conditions or symptoms can become urgent. Use this page for education, but seek help quickly if warning signs are present.

Get urgent medical care now if there is any severe, sudden, rapidly worsening or worrying symptom, especially:

• chest pain, pressure or pain spreading to the arm, jaw or back
• trouble breathing, blue lips, severe wheeze or choking
• stroke-like symptoms such as face drooping, arm weakness or speech trouble
• collapse, fainting, seizure, confusion or extreme drowsiness
• severe bleeding, black stools, vomiting blood or major injury
• severe allergic reaction, swelling of the face/throat or widespread rash with breathing trouble
• severe abdominal pain, severe headache, stiff neck or sudden vision change
• signs of severe dehydration, sepsis, high fever with worsening illness, or symptoms in a baby/young child that concern you