Other signs of pernicious anaemia include a sore, red tongue, mouth ulcers, pins and needles, changes to mood or mental function and having disturbed vision.
Pernicious anaemia usually is easy to treat with vitamin B12 shots or pills.
If a person has severe pernicious anaemia, their GP may recommend shots first.
Shots are usually given in a muscle every day or every week until the level of vitamin B12 in the blood increases.
After the vitamin B12 blood levels returns to normal, a person may get a shot only once a month.