My back aches wickedly.

我的背痛得厉害。

youdao

After caching so much food, Jack's back aches.

藏了那么多食物后，杰克的背很酸。

youdao

You may find your knees hurt, or your back aches.

你可能发觉膝盖容易受伤，或者背痛。

youdao

Or say you hacked 36 holes of golf and your lower back aches.

FORBES: Magazine Article

After her diagnosis, she realized she had been sick for nearly a year, trying fruitlessly to ignore the nightly fevers and back aches.

FORBES: When Illness Strikes

Trawling around the shops can cause headaches and joint pain, while gardening and DIY can lead to joint and lower back aches.

BBC: Bank Holiday health risk