Why is the urine black?
Recently, the topic of abnormal urine color has triggered widespread discussion on social media and health forums, especially the phenomenon of "black urine" has become a hot topic. This article will combine the hot topics and medical information on the Internet in the past 10 days to provide you with a detailed analysis of the possible causes of black urine, related diseases and countermeasures.
1. Common causes of abnormal urine color

| color | Common causes | Related diseases/factors |
|---|---|---|
| black | Hemoglobinuria, drug effects, metabolic abnormalities | Hemolytic anemia, melanoma, iron drugs |
| dark brown | Dehydration, hepatobiliary disease | Hepatitis, bile duct obstruction |
| red | Hematuria, food pigments | Urinary system stones, nephritis |
2. Analysis of the specific causes of black urine
1.hemoglobinuria: When a large number of red blood cells rupture, hemoglobin is released into the urine, which may appear soy sauce or black. It is common in diseases such as hemolytic anemia and malaria.
2.Drug or food factors: Taking iron supplements, metronidazole and other drugs, or eating a large amount of blackberries, aloe vera and other foods may cause the urine to temporarily turn black.
3.Inherited metabolic diseases: For example, alkaptonuria (a rare genetic disease) causes urine to gradually turn black when exposed to air.
4.melanoma: Rarely, metastasis of malignant melanoma to the urinary system may cause melanuria.
3. Statistics of hotly discussed topics across the Internet (last 10 days)
| Platform | Amount of related topics | Popular keywords |
|---|---|---|
| 12,000 items | #urine colorhealth#, #黑peeScary# | |
| Zhihu | 680 questions | “Does black urine require immediate medical attention?” |
| Douyin | 4.3 million views | "Self-Check Guide to Urine Color" |
4. Expert suggestions and countermeasures
1.Seek medical attention promptly: If black urine still occurs after eliminating food and drug factors, it is recommended to see a doctor within 24 hours, and a urine routine, blood test, etc. are required.
2.Self-examination method: Record urine change time, accompanying symptoms (such as fever, low back pain), recent medication history and other information.
3.Precautions: Maintain adequate drinking water, avoid drug abuse, and conduct regular physical examinations to screen for metabolic diseases.
5. Sharing of real cases from netizens
| Case | final diagnosis | treatment results |
|---|---|---|
| Dark urine and fatigue after exercise | rhabdomyolysis | Recovery after hospitalization and rehydration |
| Long-term dark urine without other symptoms | alkaptonuria | Lifelong follow-up management |
Summary:Urine color is an important health indicator, and dark urine may indicate serious illness. Recent hot discussions on the Internet reflect the public's increased attention to health self-examination, but attention must be paid to distinguishing the authenticity of online information, and it is recommended to rely on professional medical institutions for diagnosis. Maintain a scientific attitude and neither panic excessively nor ignore warning signals sent by the body.
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