<s>[INST] Dear doctor, I was diagnosised with TB infection in my left upper back by ultrasound guided FNAC in february 2013, Medications: from March to May 2013 (1st 3 months) i took 4 tablets daily contained Rifampicin 150mg + Isoniazid 75mg + Pyrazinamide 400mg + Ethambutol 275mg/tablet. Then from June to December 2013 (next 7 months) i took 2 tablets daily contained Rifampicin 300mg/ + Isoniazid 100mg/tablet. In December 2013 i had the TB skin test which was 12 mm. Then from januray 14 to april 30 i again continued the second dose as usual. But still now i feel a pinch type pain inside while i stretch my left upper back muscle. Please give me your valuable suggestion whether i should go for the surgery now to get rid of the infection. [/INST] HelloAs you mentioned that there is a tuberculosis in the back ( in my opinion this may be extra pulmonary tuberculosis after fnac report).But dosage you mentioned of anti tubercular medicine is not perfect ( in my opinion ).The dosage are adjusted according to weight wise as:Rifampicin 8-9 mg /kg body weight.Isoniazide 10 mg /kg Ethambutol  16-18 mg /KgPyrazinemide 25-30 mg /kg.In my opinion this treatment should be for initial 2-3 months according to severity of symptoms ( known as intensive treatment ) .After this 2nd treatment started depending on condition of disease 6 months to 1 year ( total ).As about tuberculin test , still you may have disease.In my opinion consult a Tuberculosis physician and get his opinion about all these .In any condition patient should not develop resistance to anti tubercular drugs.Hope this will help you. </s>