Furthermore, the sores that appear may be white, round, or grey with a red edge to their border.
Canker sores are just one symptom of B12 deficiency.
Other symptoms that can be experienced are:
• A pale yellow tinge to the skin
• A sore and red tongue
• Mouth ulcers
• Changes in the way a person moves or walks
• Disturbed vision
• Irritability
• Depression
• Changes in the way a person thinks, feels or behaves
• A decline in mental abilities