what would cause muscle cramping

What would cause muscle cramping? I get muscle cramps in my upper extremidies almost daily by the slightest movement of reaching behind me, or  lifting things. I eat bananas because i take a diurertic for my blood pressure and  drink plenty of water. they just seem to pop up at various times. Is this a neurological disorder?

[caregiver222]

Generally this is due to a calcium deficiency. The first treatment of choice is two glasses of milk a day or a calcium supplement.

Ocasionally it is due to a magnesium or potasium abnormality.

Bannanas contain potasium and you might try eliminating them.

It is probably not a neurological disorder.

[Londres70]

I would recommend having your calcium, potassium and magnesium levels checked, in particular the potassium level because some diuretics are notorious for depleting potassium levels which is probably why you were told to eat the bananas; foods high in potassium.