of bone is a very chronic condition and requires continous treatment for long time.
It is important that the confirm diagnosis of tuberculosis of bone is first done with the help of investigation and than starting the treatment, as the treatment is very long and have to be taken continously.
As far as the cough
is concern this should not be because of tuberculosis as she already taking antitubecular medications and there is chance that may be suffering from some other problem which can be causing cough like common cold
or some other repiratory infection.
What is more problematic is the no improvement in the condition after taking medication for 4 months. Normally tuberculosis patient starts improving within a month after treatment, so I suggest you to consult your doctor again why she is not improving after 4 months of treatment.
Thanks and take care.