Tuberculosis is mainly due to the infection of the human body by tuberculosis bacteria, which proliferate massively within the body, destroying the tissues and organs, and producing some blood syndromes related to combined toxins. Symptoms such as low-grade fever, night sweats, blood-stained sputum, and afternoon feverishness are common, and weight loss is also a common occurrence.

Different forms of tuberculosis have different clinical symptoms. Tuberculosis can be cured if it is identified early and treated promptly and properly with anti-tuberculosis therapy, allowing many to recover completely.