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Have a indwelling catheter drank roughly 4 litres of fluid yesterday and only had 500ml collected in urine bag all day . Went to sleep at 9pm woke up at 6am having pain round penis area to find 2000ml night bag full also day bag of 500ml so urine was trying to get out another way causing me pain . My question is why didn’t this empty throughout the day ?? Can’t understand why it’s at night and this is happening every night hope you have some answers thanks