高烧
一般会用：high fever
医学用语：hyperpyretic, hyperpyrexia
例句：
连续三天都发烧
He had a high fever for three days.
种疾病症状包括发高烧体重减轻
Symptoms of the disease include high fever and weight loss.
病症包括皮疹、发烧关节疼痛
The symptoms include skin rashes, high fever, and painful joint