you need to involve his medical provider if you are unclear as to the cause of the symptoms or their significance. for instance if a child has a history of asthma or pneumonia they need medical intervention sooner than a child who doesn't have this history. if your two-year old had flu vaccine this year he is less likely to get influenza; if not he may need to be seen early since influenza can be treated in the first two days. so his medical history plays a huge role as well as your comfort in dealing with his fever and cough. when in doubt seek medical help.
how do you know when to take a two year old in to doctors that has a fever and a cough? . he has had a fever all day ranging from 100. 2-103. 4 at its peak today. he also has a cough.