5 year old has the flu. day 5 with a fever that comes and goes up to 102. when fever comes down she is more active. is it normal to last this long?

It can last longer: than 5 days. I am not sure if your child was tested or if the diagnosis was made on clinical grounds. She sounds like she is putting up a good fight against the infection which sounds viral in nature. Continue supportive measures with fluid support, rest and judicious regulation of temperature. If her sense of well being declines then a re check is indicated.

Need evaluation: by pediatrician , kids do not tolerate high temperature Need right diagnosis and appropriate measures has to be taken soon Please call the kids pediatrician now.