Multiple myeloma can be difficult to diagnose because it's an uncommon type of cancer that usually has few or no symptoms in the early stages.
Your GP will examine you and ask about your symptoms, medical history and overall health. During the examination, your GP will look for things such as bleeding, signs of infection and specific areas of bone tenderness.
You may need urine and blood tests to check for certain types of antibodies and proteins (immunoglobulins).
If multiple myeloma is suspected, you'll be referred to hospital to see a haematologist (a doctor who specialises in conditions affecting the blood) for further tests and scans.
In hospital you are likely to have X-rays taken of your arms, legs, skull, spine and pelvis to look for any damage.
A bone marrow biopsy is usually needed to confirm multiple myeloma. A needle is used to take a small sample of bone marrow (where all the blood cells are made) from one of your bones, usually the pelvis. A small sample of bone may also be removed.
This is carried out using a local anaesthetic, which means the area where the needle is inserted is numbed.
The samples of bone marrow and bone will then be checked for cancerous plasma cells.