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
如何判斷雞翅是否變壞?

如何判斷雞翅是否變壞?

重點摘要 雞翅會變質嗎? 如何判斷雞翅是否變壞? 過期雞翅還能食嗎? 雞翅可存放多久? 如何儲存雞翅? 雞翅可以冷凍嗎? 結論 雞翅會變質嗎? 會。皮脂較多、表面不潔或溫度過高時,細菌繁殖更快。 如何判斷雞翅是否變壞? 外觀:皮色發黃、出黑斑或血水。 觸感:表面黏滑、軟爛。 氣...
如何判斷雞蛋是否變壞?

如何判斷雞蛋是否變壞?

重點摘要 雞蛋會變質嗎? 如何判斷雞蛋是否變壞? 過期雞蛋還能食嗎? 雞蛋可存放多久? 如何儲存雞蛋? 雞蛋可以冷凍嗎? 結論 雞蛋會變質嗎? 會。殼面有微孔,溫差及濕度變化會令細菌入侵。 如何判斷雞蛋是否變壞? 水測:沉底=較新鮮;浮起=多半變壞。 打開觀察:蛋白渾濁水樣、蛋黃...
如何判斷羊肉是否變壞?

如何判斷羊肉是否變壞?

重點摘要 羊肉會變質嗎? 如何判斷羊肉是否變壞? 過期羊肉還能食嗎? 羊肉可存放多久? 如何儲存羊肉? 羊肉可以冷凍嗎? 結論 羊肉會變質嗎? 會。脂肪多而易氧化,處理或存放唔好就會變壞。 如何判斷羊肉是否變壞? 顏色:紅轉黑,或出現綠斑。 脂肪:由白轉黃兼有酸味。 氣味:由輕...
如何判斷豬肉是否變壞?

如何判斷豬肉是否變壞?

重點摘要 豬肉會變質嗎? 如何判斷豬肉是否變壞? 過期豬肉還能食嗎? 豬肉可存放多久? 如何儲存豬肉? 豬肉可以冷凍嗎? 結論 豬肉會變質嗎? 會。豬肉表面水活度高,加上處理不潔或溫度過高,容易腐敗。 如何判斷豬肉是否變壞? 顏色:粉紅轉灰、發綠或出斑。 氣味:酸臭、腥臭味濃 ...
如何判斷牛肉是否變壞?

如何判斷牛肉是否變壞?

重點摘要 牛肉會變質嗎? 如何判斷牛肉是否變壞? 過期牛肉還能食嗎? 牛肉可存放多久? 如何儲存牛肉? 牛肉可以冷凍嗎? 結論 牛肉會變質嗎? 會。牛肉含高蛋白同水分,若溫度控制或衛生不當,細菌會快速繁殖,導致變壞。 如何判斷牛肉是否變壞? 顏色:鮮紅轉深褐甚至發黑;脂肪變黃。 ...
成年後懷疑自己有注意力不足過動症(ADHD),應該接受診斷嗎?

成年後懷疑自己有注意力不足過動症(ADHD),應該接受診斷嗎?

在過去,注意力不足過動症(Attention-Deficit/Hyperactivity Disorder, ADHD)多被視為「小孩的病」,很多成年人小時候從未被評估或診斷。直到近年社會對心理健康重視度提升,許多成人才開始懷疑,自己長期以來的專注困難、健忘、衝動或時間管理不良,可能與 ADHD 有關。這種「晚發現」的情況相當普遍,也引發了問題:成年後是否值得接受 ADHD 診斷?

哪些職業對健康影響最大?科學與現實的分析

哪些職業對健康影響最大?科學與現實的分析

在現代社會中,工作佔據了人們生命中相當大的一部分。然而,不同職業對健康的風險並不相同。一些工作性質或環境,會顯著增加慢性病、心理壓力、甚至縮短壽命的風險。以下從科學研究與醫學角度,探討幾類對健康損害較大的職業,並附上相關統計數據。

電擊槍的機制與對人體健康影響

電擊槍的機制與對人體健康影響

在現代執法中,警察常使用所謂「非致命性武器」(less-lethal weapons),其中最廣為人知的便是 電擊槍(Taser)。電擊槍的設計初衷是提供一種介於徒手制服與槍械之間的選擇,藉由暫時性電擊使嫌疑人失去行動能力,以降低致命暴力發生的風險。然而,電擊槍並非完全無害,背後涉及的電流機制與人體生理反應值得深入探討。

PD-(L)1/VEGF「三抗」:腫瘤免疫治療新方向

PD-(L)1/VEGF「三抗」:腫瘤免疫治療新方向

腫瘤治療的新挑戰 近十年來,免疫檢查點抑制劑(Immune Checkpoint Inhibitors, ICIs)改變咗癌症治療格局。當中 PD-1/PD-L1 抑制劑 已經成為多種腫瘤的一線或二線療法,而 VEGF 抑制劑 亦係抗血管生成治療嘅核心藥物。然而,臨床數據顯示,雖然 PD-(L...