The blackened tongue may be caused by physiological factors such as eating black food, taking drugs that can be easily stained, or it may be caused by black hairy tongue, uremia, and so on.
1. Physiological factors: If you eat black foods such as mulberry and dark chocolate, it may lead to staining of the tongue, thus showing the blackened tongue. In addition, some people take bismuth agents such as bismuth potassium citrate, which may also lead to black tongue, this is because bismuth citrate, a drug component is black.
2. Black hairy tongue: black hairy tongue is caused by long-term use of broad-spectrum antibiotics or glucocorticoids, immune deficiency, tumors and so on. The middle of the back of the patient’s tongue will appear filiform papillae elongation, and the color is black, so the patient will have black hairy tongue will have the symptom of blackening of the tongue.
3. Uremia: Uremia is caused by chronic glomerulonephritis, diabetic nephropathy, hereditary nephritis and other diseases. Patients will have nausea and vomiting, anemia, bleeding and other manifestations, some patients will also have a black tongue, as well as dark, swollen and other symptoms.
It is recommended that patients with blackened tongue need to consult a doctor, who will choose the appropriate measures for treatment according to the cause of the disease.