A " conservative treatment" would be a treatment where you do the minimum.

“保守治疗”是一种你做最少的治疗。

He's also recommending a conservative treatment for this condition, and if I really have it, I want to be more aggressive.

他还建议对这种情况进行保守治疗， 如果我真的有这种情况，我想更积极一些。