aftereffect
noun [ C usually pl ] uk/ˈɑːf.tər.ɪˌfekt/ us/ˈæf.tɚ.əˌfekt/
事后影响；余波；后遗症
an unpleasant effect that follows an event or accident, sometimes continuing for a long time or happening some time after it
Headaches are an aftereffect of this sort of accident. 头痛是这种事故的一种后遗症。