In general, obsolete TB does not require treatment. Obsolete TB is clinically defined as the absence of any clinical symptoms, a negative sputum TB test, and imaging findings of calcification, sclerosis and fibrosis, which are inactive TB and do not require anti-tuberculosis treatment. Old tuberculosis usually has more stable lung lesions, but also has a certain chance of recurrence. If patients frequently engage in activities such as smoking, drinking, and staying up late, tuberculosis may recur. The underlying disease should be actively treated to prevent weakening, which may lead to recurrence. If patients develop symptoms such as low fever, night sweats, cough and weakness, they should seek hospital examination for tuberculin test, blood sedimentation and chest CT as soon as possible to prevent old TB from becoming active TB. Patients with old tuberculosis need to pay attention to rest and ensure enough sleep. Also try to eat a balanced diet with more cereals rich in dietary fiber and fresh fruits and vegetables. Actively take vitamin and protein supplements. Keep a happy mood and avoid tension and anxiety. Review chest CT or chest X-ray regularly for any recurrence.