Your son's cough does not appear to have an allergic cause. Your description of his cough strongly suggests that he has a form of whooping cough.This illness is known by the medical term as"Parapertussis"It is important to treat whooping cough as early as possible otherwise the coughing spells may continue for longer than 3 months.It woulld be best to take him to see your paediatrician.He can go back onto his original milk.
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