"疼痛的酸痛" 的英语是 "aching pain"。这个短语来源于 "ache" 这个动词，它指的是持续性的、不断加重的疼痛。
例句：
I have an aching pain in my back. (我的背部有一种酸痛的疼痛。)
The aching pain in my knee makes it hard for me to walk. (我膝盖里的酸痛疼痛使我走路困难。)
The headache was an aching pain that wouldn't go away. (头痛是一种酸痛的疼痛，不会消失。)