My baby is having cough since quite a long time .i showed him to two doctors.but still cough is dere whatto do ?pls help

A. this can be allergic bronchitis baby is having needs inhalation therapy k v Cold and cough in small babies are because of viral infections you have to treat them symptomatically with steam inhalation and saline drops in the nose of the baby e they will subside generally in a week's time