welcome to healthcaremagic,
your daughter could be either having
- an allergic reaction
due to the itchiness of the body and the hot face.
- a viral infection of some kind need to rule out measles
or any other viral infection
- food poisoning
due to diarrhoea
- inflammatory condition
would suggest take her to be seen by a pediatrician
to know what is wrong and to be give the appropriate treatment.
wish your daughter a quick recovery.