Tuberculosis old low fever need to actively cooperate with the doctor to take standardized anti-tuberculosis treatment. Tuberculosis patients with low fever, mainly caused by the immune response after infection with Mycobacterium tuberculosis, usually manifested in the afternoon low fever, and accompanied by night sweats, fatigue, emaciation and other symptoms. Once diagnosed with tuberculosis, the patient should cooperate with the doctor for anti-tuberculosis drug treatment, commonly used drugs are isoniazid, rifampicin, and also can take ethambutol, pyrazinamide, streptomycin, etc. for combination treatment. After the anti-tuberculosis treatment, as the tuberculosis bacillus gradually reduces, the symptoms of low fever will be significantly relieved, during the period of medication, we should pay attention to not arbitrarily stopping and reducing the medication, to avoid the recurrence of the disease. Tuberculosis patients must be guided by a doctor to use drugs, patients can not be arbitrary use of drugs, pay attention to the composition of the drug, allergy is prohibited after the use of drugs, if the adverse reaction is obvious, need to stop the drug and consult a doctor in a timely manner.