In general, a Norway Tourist Visa cannot be extended once you are in Norway. Short-stay Schengen visas are valid for a maximum of 90 days within a 180-day period. Extensions are granted only in exceptional situations such as serious illness, unexpected emergencies, or humanitarian reasons. Supporting documents are required to justify the request. If your visa expires and you overstay without approval, it may lead to fines, deportation, or restrictions on future travel to Norway and other Schengen countries.