is due to persistence of infection or in adequate treatment.
frequent relapsing fever is seen in condititons like malaria
if you are living in an endemic region i would advise you to consult a physician and get a complete blood work up done including for malaria and dengue
look out for any wound which might be infected.
if the fever is very high give her tepid sponging. continue the medications till you meet your physician.
i hope i have answered your query.
i wish a daughter a speeedy recovery.