Most people do not experience any symptoms when newly infected. However, some people have acute illness with symptoms that last several weeks, including:
- yellowing of the skin and eyes (jaundice)
- dark urine
- extreme fatigue
- nausea
- vomiting
- abdominal pain.
Read more about hepatitis B on the WHO website
https://www.worldhepatitisalliance.org/what-is-viral-hepatitis/