Lyric discussion by madamimadamk 

Cover art for Where Do We Go Now but Nowhere? lyrics by Nick Cave and the Bad Seeds

I think this song is a kind of Nick's recollection about a relationship, but written and told (sung) after many years. It might suggest that the protagonist ended a relationship rapidly, and never had opportunity to talk with his significant other about the past. The Child would be a love that was between these two, and since the love was over, that metaphorical child was as well (the hospital motives fit). And Nick thinking of all that after years regrets, or even miss the old feelings and wants her lover to wake up. Or maybe it's a song about the meeting of these two after some time ("Ravaged avenger with a clip in your hair" who shows in his life again with feelings still sour.