如果您患有疾病，您可以说："I need to seek treatment for my illness." 或者 "I need to go for medical treatment for my illness."

这个短语的来源可以追溯到中世纪的英语。"Treatment"在这里的意思是"医疗治疗"，"seek"的意思是"寻求"。

一些其他例句：

I have to go to the doctor to get treatment for my cold. (我必须去看医生治愈我的感冒。)
I need to see a speciapst for treatment of my chronic pain. (我需要看专科医生治疗我的慢性疼痛。)
I need to start a course of treatment for my depression. (我需要开始接受抑郁症治疗。)