If you have anaemia caused by a vitamin B12 deficiency, you may have other symptoms that affect your behaviour.
The NHS says you may notice irritability, depression, changes in the way you think, feel and behave, and a decline in your mental abilities, such as memory, understanding and judgement.
If you have anaemia caused by a vitamin B12 deficiency, you may have other symptoms, such as a pale yellow tinge to your skin, a sore and red tongue and mouth ulcers.
Others report pins and needles, changes in the way that you walk and move around, and disturbed vision.