Hi I need to give you a bit of history first ,Have 4 grand- daughters I 8 was sick about 1 week back siad she had headache and sore stomach but seemed to be over it in 24 hours ,then her younger sister 4 yrs had the same thing on two days ago headache and hot and cold flushes ,yesterday 18 months old was very lethargic and hot and cold also and today is still the same ,am trying to keep her temp down in the normal ways but she has occassionally been having body jerks is this something I need to be concerned about