Dr. Leung Yiu Lam Simon

Specialist in Urology

MBBS (HK), MS (HK), FRCSEd, FRCSEd (Urology),

FCSHK, FHKAM (Surgery)

Normally a person urinates 4-6 times during daytime and may not have to go at night while sleeping. People are suffering from frequent voiding if they have more voids, either in daytime or at night, than above stated. Nocturnal (night time) urine production is around 300-400ml during sleep, the bladder capacity is around 400-500ml, therefore the body can effectively store up all the urine produced and the person can sleep through the night without waking up to void. However, many factors can contribute to this abnormal condition called Nocturia (night toilet), such as variations of functional bladder capacities among people, different amount of water intake before bedtime or it could be implications of underlying urological disorders that requires medical attention and should not be neglected.

Dr. Que Bon We Manuel

Specialist in Urology

MBBS (HK), FRCS (Edin),

FCSHK, FHKAM (Surgery), Dip Urol (Lond)

Men are usually reluctant to either reveal or seek for proper medical treatment on their urological problems based on their belief that urological problems are normal phenomena of ageing. Because of this, they suffer a lot both mentally and physically, like they have to wake up at night 2-3 times for voiding. In fact, their situation could be alleviated upon proper medical treatment with appropriate medications. They could soon improve and restore quality of life, without further being annoyed by night-toilet (nocturia).

Dr. Wong Kwok Tin Martin

Specialist in Urology


FRCS (Urology) (Edin), FHKAM (Surgery)

Nocturia patients generally consider Benign Prostatic Hyperplasia (BPH) or Overactive Bladder (OAB) the only cause of their nocturia problem. Nevertheless, they are still suffering from night-toilet (nocturia) to a certain extent after having medical treatment targeting the problem of BPH and OAB. It reflects that their problems are very likely to be multi-factorial. Keeping a voiding chart is a very simple but useful tool to assist doctors to have a preliminary assessment on their situation. In fact, nocturia patients could make a self-assessment with this tool and this simple procedure would definitely help doctors accurately diagnose their problems thus providing the most suitable or sometimes combinational therapies.

Dr. Lee Chi Keung

Specialist in Emergency Medicine

MBBS (HK), FRCS (Edin),


Unless a person drinks too much water before sleeping, normally he/she does not need to get up for the toilet provided that he/she has properly emptied the bladder before sleep. Polyuria, Nocturnal Polyuria, Bladder Storage problems and Sleeping problems are some of the more common causes leading to nocturia; Nocturnal Polyuria, with which the person has normal urine output during daytime but abnormally high urine production at night, is the major cause of Nocturia. Moreover, diabetes mellitus, inflammation of bladder (cystitis) and benign prostatic hyperplasia (BPH) could also result in nocturia. For patients experiencing nocturia, it is therefore recommended to seek early medical attention for proper diagonosis and treatment.

Dr. Chan Tat Eddie

Specialist in Paediatrics

M. Med (Sing), MRCP (UK), MRCP (Ireland),

DOM (CUHK), FHKAM (Family Medicine), FHKAM (Paed)

Many people mistakenly think that night-toilet (nocturia) is only the problem of middle-aged men and they would therefore neglect it as a problem. In fact, nocturia affects all ages and both men and women. By understanding more about nocturia, focusing on the problem and seeking proper medical treatment would be the best strategy. This website provides useful information about nocturia and will help the general public to have a better understanding of the condition, if you are interested in knowing and asking more questions, please further visit the “Expert Q&A” interactive platform for information on important questions related to the problem.

Dr. Kwan Ka Mei Betty

Specialist in Family Medicine


FHKCFP, FHKAM (Family Medicine)

Many of us in Hong Kong regard Nocturia as a normal process of ageing, a condition that comes with age, as we get older, we will need to get up at night to urinate, this is in fact wrong. As a matter of fact, nocturia can be corrected and there is no need to wake up at night for night toilet. It is a proven fact from many clinical studies that disturbed sleeping pattern at night (bad quality of sleep), results in reduction of daytime working capability and overall quality of life. If you are now suffering from nocturia, do not hesitate to look into the disease and seek for appropriate professional medical treatments. Also, you are advised not to consume some over-the-counter medications without first consulting professionals, for example consuming herbal medicines, Chinese medicines, or health products which often do no list out the active drug content; it may contrarily delay proper diagnosis and worsen underlying diseases or symptoms. Proper medical help is recommended.