After the cold is gone, it is possible for
the inflammation to linger. This inflammation can last for
several <span style = 'background-color: #dae8f4'>weeks</span>
. Sometimes this inflammation may linger for 3
to 6 months. Eventually the inflammation will go away, and then the excessive phlegm
will stop. This is called RAD and behaves a lot like asthma. This inflammation often clears more quickly when it is treated with
an inhaled steroid medicine that is used to treat asthma.