My four year old having cough since last 2 months , dr saying she is having child asthama, what precautions to take?

A. avoid dust and temperature variations. it appears to be allergic cough/cold. they can be associated with temperature variations around the body (hot to cold or cold to hot environmental changes) which the body cannot sustain leading to cough usually at evening /night and morning. requires examination and start anti allergic medicines. meet dr and prevent such temperature variations.