1. 愈合：heady 鲁莽的 | heal up 愈合 | heal 治愈

2. (伤口)愈合：pay up 付清 | heal up (伤口)愈合 | close up (使伤口)愈合

1. （伤口）痊愈，愈合
    When an injury heals up, it becomes completely healthy again.

heal up的近义词

    e.g. Before too long my lung abscess healed up.
           没多久，我的肺脓肿就痊愈了。