If you need to pass urine often, but pass only small amounts each time, and especially if it also stings or burns to pass it, the lining of your bladder is probably inflamed (cystitis). Possible reasons include infection, radiation to the pelvic area and the chemotherapy drug cyclophosphamide (see pages 257-59).

If you need to pass urine often in large amounts, you are producing too much urine. Possible causes include kidney failure, sugar diabetes (perhaps due to corticosteroids), diabetes insipides and too much calcium in the blood. Diabetes insipides is a condition where you pass large amounts of very weak urine. It can follow attempts to destroy the pituitary gland — see page 295.

Your doctor should quickly be able to find out why you are passing urine too often by testing your urine and blood.

I’ll just explain a bit more here about one of the possible causes. Too much calcium in the blood is a complication of cancer which we have not discussed in detail so far. If this is the reason for you passing a lot of urine often, you are likely to have other symptoms as well— nausea, unusual thirst, a metallic taste in the mouth, constipation, muscle weakness, drowsiness and confusion.

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