Hello doctor.my son has fever cold cough. for past 6 days.giving P250. But his fever increasing and decreasing 98 to 101.5 taken dengue and malaria test also result is negative only.now cough reduced.but still he has fever.feeling restless. He is often sleeping basically he is very active.but now he is always lying on bed always What's the reason for this.really I worried lot.what should I do now