What cause low potassium level?

Causes other then just diet.
Answers:
Frequent or prolonged diarrhoea or vomiting.
Use of laxatives, use of diuretics ('water' tablets)
Hormone problems (too much cortisol or aldosterone from the adrenals)
Lack of magnesium
Alkalosis (alkaline blood pH)
Eating loads of liquorice
I know that my mother is on a high blood pressure medicine which causes cell to lose water by.. well, quite frankly, by peeing.

As a result she loses a great deal of important ions - potassium included.
Clinically?

Tissue and vascular dysfunction, diarrhoea, just to designation a few.

Endocrine problems esp with aldosterone secretion, intracellular problems, and electrolytes and metabolism problems.

Normally, doc more concerned with hyperkalaemia rather than hypokalaemia. Unless something clearly wrong.

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