我知道，我的背疼死了。

Oh, my back is killing me.

youdao

我的背又在一直疼了。

My back's been troubling me again.

《牛津词典》

难怪我的背开始疼并且我总觉得精力不够。

No wonder I started having back pain and was constantly low on energy!

youdao

这样子坐久了，我的背开始时而不时地疼起来。

Sitting like that for a long time, my back hurt now and then.

youdao

我的背很疼。

My back hurts badly.

youdao

我的背很疼。

My back hurts badly.

youdao