Should You Seek Medical Attention for Blue-Purple Urine? - Urology

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Should I seek medical attention if my urine is blue or purple?


Dear Dr.
Zhang,
My mother is 58 years old and had a history of urinary stones a year ago (the stones were located at the renal pelvis).
She reports no current discomfort; however, I have noticed that the area below the waterline of her toilet bowl has a bluish-purple discoloration (I clean her toilet once a week).
She is currently taking K-CITRATE GRANULES 5GM intermittently.
Could this discoloration be related to her medication, or are there other concerns I should be aware of? Should I insist that she see a doctor? (She is reluctant to go to the hospital unless absolutely necessary.) Thank you for your patience in reading this.

Gudian, 30~39 year old female. Ask Date: 2007/05/01

Dr. Zhang Chengye reply Urology


Hello: It is recommended that you seek medical examination, as the medication is not the cause.
You may have a urinary tract infection, and a urine culture is needed.

Reply Date: 2007/05/01

More Info


When it comes to the observation of blue-purple urine, it is essential to consider several factors that could contribute to this unusual coloration. The first step is to understand the potential causes of such a symptom, especially in the context of your mother's medical history and current medication.

The blue-purple discoloration of urine can be attributed to a few different factors. One of the most common causes is the presence of certain medications or supplements that can alter urine color. In your mother's case, she is taking K-Citrate (potassium citrate), which is often prescribed to help dissolve kidney stones and prevent their formation. While potassium citrate itself is not typically known to cause blue or purple urine, it is essential to consider that urine color can be influenced by various factors, including diet, hydration status, and other medications.

Another potential cause of blue or purple urine is a condition known as "blue diaper syndrome," which is associated with a metabolic disorder that leads to the excretion of indigo or indican in the urine. However, this condition is rare and usually presents with other symptoms. Additionally, certain foods, such as beets or blackberries, can also cause urine discoloration, but these would typically not result in a blue or purple hue.

Given that your mother has a history of urinary tract stones, it is crucial to monitor her urinary symptoms closely. While she may not currently exhibit any discomfort or other symptoms, the presence of unusual urine color could indicate an underlying issue that warrants further investigation. For instance, if there is a urinary tract infection (UTI) or other complications related to her previous kidney stones, these conditions could potentially lead to changes in urine color.

In terms of seeking medical attention, it is advisable to err on the side of caution. If the blue-purple urine persists or is accompanied by any other symptoms—such as changes in urinary frequency, pain during urination, fever, or any other unusual signs—then it would be prudent to consult a healthcare professional. While your mother may be hesitant to visit a hospital, it is essential to prioritize her health and well-being. A healthcare provider can conduct a thorough evaluation, including a urinalysis, to determine the cause of the discoloration and recommend appropriate treatment if necessary.

In summary, while the blue-purple urine may not immediately indicate a severe problem, it is essential to monitor the situation closely. Encourage your mother to stay hydrated and maintain a balanced diet, and consider discussing her symptoms with her healthcare provider, especially if the discoloration persists or if any new symptoms arise. Taking proactive steps can help ensure her health is safeguarded and any potential issues are addressed promptly.

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