Thanks for Query,
Her coughing problem is a chronic bronchus
infection she may get from her bus journey.I know Indian bus journey as I proud to be from India ,where lots of dust ,crowding in bus leads to respiratory infection.
You must check herself with physician he will suggest you blood test
along with X-ray chest & diagnose the disease & advised accordingly.
Her constant low hemoglobin
also needs attention.Her low Bp
also due to low hemoglobin level.