Anaemia is caused when you don’t have enough red blood cells (RBCs) or haemoglobin – the part of your RBCs that carries oxygen – to meet your body’s needs.

If your liver is healthy, there should be little or no fat in it. However, sometimes, fat molecules called triglycerides begin to collect in your liver cells. Small amounts of fat in your liver usually cause no problems. However, when too much fat builds up, this is called fatty liver disease.

Gallstones are solid lumps or "stones" which form in the gallbladder or bile duct. They are formed when some of the chemicals stored in the gallbladder harden.

A kidney stone is a hard, stone-like mass that can form in one or both kidneys.