What it is
It is usually easy to treat with B12 injections or tablets, or folic acid tablets. Some people need treatment for life.
If not treated, low B12 can cause problems with the nerves, memory and balance, which may not fully recover.
Common signs
- Tiredness and lack of energy
- Pale or yellow skin
- A sore, red tongue or mouth ulcers
- Pins and needles
- Problems with memory, thinking or balance
- Feeling low or irritable
How it is usually diagnosed
- A full blood count
- Blood tests for B12 and folate levels
- Sometimes tests for intrinsic factor antibodies
Records worth keeping
Keeping these together makes each appointment easier, especially when you see a new doctor:
- Full blood count results over time
- B12 and folate levels
- Injection schedule
- Haematology or GP notes
Questions to ask your doctor
- What is causing my low levels?
- Do I need injections or tablets, and for how long?
- When should my blood be checked again?
When to get help right away
Call 112 or go to the nearest emergency department if you have:
- New problems walking, severe confusion, or numbness spreading in the legs: get urgent help the same day
This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.