If your body temperature is over 38C or 100.4F then you have a fever.
( prevent illness with powerful nutrition suitable for children and adults )
A temperature of 38.1 would indicate you have a fever, yes.
Yes 38.1C is a high temperature.
- in children under five, a fever (high temperature) is a temperature over 37.5C (99.5F)
- in children five and over, a fever is a temperature of 38C (100.4F) or over