為什麼小便是黃色的?

What color is "normal" urine?

Everyone has a different "normal" color for their urine, but it should fall into the yellow spectrum.

The amount of water you drink can affect whether the color is light yellow or dark amber. People who drink more water and stay hydrated often produce more dilute, light-colored urine than people who are dehydrated or drink less water.

What causes urine color to change?

As mentioned above, the color of your urine mainly depends on how much water you drink. When you drink a lot of water, your urine becomes so light that it looks almost clear. The less water you drink, the darker your urine will become.

Diet, vitamins and minerals

Diet may also be a factor. The colors of all-natural foods can interact with pigments to create different colors. Highly processed foods may contain large amounts of food coloring. The dye also interacts with pigments.

B vitamins, such as riboflavin (B-2) and cobalamin (B-12), are also known to cause fluorescent yellow-green urine. If you take supplements or multivitamins, they may be the source of your brightly colored urine.

Meal replacement shakes are also rich in B vitamins and can have the same effect.

Excess beta-carotene or vitamin C may cause urine to appear dark yellow or orange. Beta-carotene is converted into vitamin A in the body and is found in yellow and orange foods such as carrots and sweet potatoes.

In addition to citrus fruits, vitamin C is also found in foods such as tomatoes, strawberries, and broccoli.

exercise

Not properly hydrating after exercise can also lead to dehydration and darker urine. Strenuous exercise without proper hydration can lead to serious conditions that lead to muscle failure.

This may cause severe muscle pain and cola- or tea-colored urine. If this happens, you should seek medical attention immediately.

drug

Over-the-counter and prescription medications can also make your urine brighter or more vivid. This includes antibiotics, laxatives, and certain chemotherapy drugs used to treat cancer.

For example, the drug phenazopyridine (Pyridium) is often used to treat discomfort associated with urinary tract infections (UTIs). A common side effect of its use is orange-colored urine.

Other drugs such as rifampicin may also harmlessly stain urine bright orange.

medical symptoms

Changes in urine color may be a sign of kidney, liver, or bladder function problems. If your urine becomes cloudy or has a strong smell, you may have a bladder or kidney infection.

This is especially true if you have any symptoms of these infections, such as pain when urinating, fever, vomiting, or back pain.

Pregnant

Anecdotal evidence suggests that bright yellow urine may be an early symptom of pregnancy. However, there is no research to support these claims.

What are the risk factors for abnormal urine color?

Your age and gender may increase your risk of conditions that affect the color of your urine. For example, kidney or bladder tumors are common in older people. Urinary tract bleeding is often related to kidney or bladder problems.

More serious illnesses, such as cancer, can also cause bleeding and pink or red urine. If you notice blood in your urine, tell your doctor right away so they can determine the cause.

Up to 60% of women will experience a urinary tract infection at least once in their lifetime. This infection may be accompanied by bleeding from the urinary tract, which changes the color of the urine. Men may also experience blood in their urine due to prostate enlargement

Urinary tract bleeding is rare in children, but certain rare diseases may cause blood in the urine. These diseases include allergic purpura, hemolytic uremic syndrome, and nephroblastoma

As in adults, any urinary tract bleeding in children is considered abnormal and should result in immediate medical attention.

How is abnormal urine color diagnosed?

If you notice any abnormalities in the color of your urine, you should see your doctor.
Consider the following:

  • When did you start noticing this change?
  • What does your diet consist of these days?
  • What medications or supplements have you taken?
  • Have you ever engaged in strenuous physical activity?
  • Have your sleep patterns changed?
  • Are your bowel movements normal?
  • Do you have a rash anywhere on your body?
  • Have you had a headache lately?
  • Do you have any problems with your vision?
  • Have you ever experienced unexplained weight loss?
  • Do you have a history of smoking?
  • Have your urinary habits changed?

A urinalysis can examine red blood cells, assess urine protein levels, and determine what excreted substances are present. Your urine may also be checked for infection-causing bacteria. If there are signs of infection, a urine culture may be needed.

Blood tests can measure kidney function and liver enzyme levels. These results may provide clues as to why urine color changes.

How to treat abnormal urine color?

Treatment options may vary depending on what your doctor finds from your tests. If your doctor finds that your dark yellow urine is due to dehydration, they will recommend adding more fluids to your diet.

Your urine color should return to its normal yellow color within a few days. If an underlying medical condition is discovered, your doctor will treat the condition.

What about abnormal urine color?

If your urine is dark yellow, it may be your body's way of telling you to drink more water. This color change may be caused by dehydration, so drink up.

Whether you're sitting at the office, working out at the gym, or lounging on the beach, it's important to stay hydrated.

If you are taking any medications that cause this discoloration, it is probably harmless. Unless otherwise advised, you should continue taking your medications under your doctor's supervision.

Review

All comments are moderated before being published

HealthyPIG Magazine

View all
牛肉與腸道微生態:人體點樣反應?

牛肉與腸道微生態:人體點樣反應?

牛肉進入身體之後會發生咩事? 食牛肉之後,身體會進入「高蛋白消化模式」: 胃部階段:胃酸(pH約2)與胃蛋白酶一齊將牛肉蛋白質分解成小分子胺基酸鏈。此時釋放「胃泌素(gastrin)」促進更多酸及酶分泌。 小腸階段:十二指腸接收食糜後,胰臟釋出胰蛋白酶、脂肪酶,肝臟釋出膽汁乳化脂肪。 ...
從嗜睡症、慢脈搏到米諾地爾 (Minoxidil) 的全身動力學

從嗜睡症、慢脈搏到米諾地爾 (Minoxidil) 的全身動力學

當身體進入「慢模式」——嗜睡症與自律神經的連結 嗜睡症(Narcolepsy)是一種大腦覺醒系統的紊亂,患者在日間容易突然進入睡眠狀態。但其實,嗜睡症不止影響「睡眠」,還會影響全身的 自律神經系統 (Autonomic Nervous System)。 自律神經負責調節: 心跳快慢(交感與...
降血壓,唔一定靠藥!了解身體機制,從生活開始調節

降血壓,唔一定靠藥!了解身體機制,從生活開始調節

高血壓唔係「年紀大」嘅專利,愈來愈多年輕人都有血壓偏高。其實,血壓高並非只係「壓力大」咁簡單,而係整個身體系統出問題:心臟、血管、腎臟、神經、荷爾蒙都有份參與。

原糖 vs 紅糖 vs 白糖:哪一種更健康?

原糖 vs 紅糖 vs 白糖:哪一種更健康?

日常生活中,我們常見的糖有「原糖」、「紅糖」與「白糖」。三者外觀、味道甚至用途都略有不同,但在營養與健康層面上又有幾大差異。本文將帶你深入了解它們的製作方式、特性與對身體的影響。

籃球係有氧運動嗎?— 一文睇清有氧同無氧運動嘅分別、好處同平衡之道

籃球係有氧運動嗎?— 一文睇清有氧同無氧運動嘅分別、好處同平衡之道

籃球係全球最受歡迎嘅運動之一,無論係街場隨意投籃、定係正式比賽,都可以幫助身體活動。但你有冇諗過,籃球到底屬於「有氧運動」定「無氧運動」?兩者又有咩分別?點樣玩先至最有益身體?

本文會同你用簡單角度拆解「有氧」同「無氧」嘅概念,並講解籃球點樣同時結合兩者,最後再分享點樣令你嘅籃球運動更健康、更有效。

男士禿頭對策:了解雄性禿與5%米諾地爾(Minoxidil)生髮原理

男士禿頭對策:了解雄性禿與5%米諾地爾(Minoxidil)生髮原理

雄性禿是什麼?為何只在頭頂出現? 好多男士年過25歲開始發現頂部頭髮越來越稀疏,但前額線卻似乎仍然正常,這情況其實非常典型。這種情況稱為 雄性禿 (Androgenetic Alopecia),是男性最常見的脫髮原因之一。 主要成因來自兩方面: 遺傳基因:如果父母其中一方有禿頭問題,後代的...
發現死老鼠點處理?

發現死老鼠點處理?

喺屋企、後花園、廚房甚至車房發現一隻「死老鼠」唔係罕見事,但好多屋主第一時間會「嚇親」或者「即刻掃走」。其實咁樣反而危險!
死鼠可能帶有漢他病毒、鈎端螺旋體病、沙門氏菌等病原體,一旦處理唔當,吸入塵埃或者接觸體液,都可能感染疾病。以下教你一套澳洲、香港、台灣都適用嘅安全清理步驟。

老鼠與大鼠的衛生影響:對人體與家居健康的真正威脅

老鼠與大鼠的衛生影響:對人體與家居健康的真正威脅

「老鼠」同「大鼠」雖然都屬於齧齒類,但牠哋對人類健康嘅影響有明顯分別。本文會詳細講解牠哋嘅衛生差異、疾病傳播途徑、同預防方法

無人機醫療配送:低空經濟下的香港新契機

無人機醫療配送:低空經濟下的香港新契機

  無人機醫療配送:低空經濟下的香港新契機 —— 從健康、醫療金融到商業模式的全球比較與啟示 在香港「低空經濟」監管沙盒下,無人機由數碼港跨海至長洲醫院,約 12 公里航線僅需 18–20 分鐘,相比傳統 45–65 分鐘大幅提速。本文聚焦醫療價值、醫療金融回報與商...