Tuberculosis on left foot. Seen in leg.

My Son aged 1.5 years, having tuberculosis in his left foot. Last September 2015, he had swelling & red color.So we took x-ray, the swelling was found in the x-ray but there was no fracture. Doctor suggested to take MRI & found that there is PUS collection & it is not affecting the bone. Then he had a minor surgery on the left foot to drain out. we went to biopsy for the collected pus. After 2 months, again swelling was seen & we took ultrasound-scan & seen that some kind of fluid is collected. Doc said tat we need to proceed for one more surgery to take place.Again surgery,the collected pus sent for biopsy & doctor informed that we are going in correct direction.first 3 months, we are giving treatment with the following medicine macox zh kid(before food),combutol 200 mg(a.f) & solonex dt 100 mg(1/2 tab after food). next 3 month, (we are in the 5th month medication & course will complete on April 20,2016), we are giving him Macox ZH hid & Combutol.again red mark seen in leg.