Correct

心火

/ xīn huǒ / 
Strokes

Example

As a Noun

internal heat

1
Xīn
心
huǒkàng
火亢
shèng
盛

excessive heart fire

As a Noun

hidden anger or annoyance

2
Jiàng
强
àn
按
xīnhuǒ
心火

suppress one's anger