1to have a high temperature (from illness); to have a fever
2(fig.) to be fascinated with; to obsess over
3(fig.) flourishing; thriving; popular
Examples
nǐ你jīn tiān今天yǒu diǎn有点fā shāo发烧，shì是ba吧？
你今天有点发烧，是吧？
You have a little fever today, don't you?
我觉得我有点要发烧了。
I think I'm coming down with a fever.
我发烧了，全身酸痛。
I have a fever and I ache all over.