Quick answer
- Where
- Their right side, at the bottom of the rib cage. On your left as you face them.
- What reaches it
- Your left side. In every style, the left hook to the body, and as a southpaw the straight left to the body too. In kickboxing and Muay Thai also the left kick and knee. Lead weapons if you stand orthodox, rear weapons if you stand southpaw.
- Why it drops people
- No study has measured it. The usual explanation is a nerve reflex that briefly drops heart rate and blood pressure. It is a theory, not a finding.[1,2]
Orthodox opponent, facing you

Liver
Their right side, behind the ribs
When to get checked
Stop after a hard body shot that leaves lasting pain or nausea, and get checked the same day. Call your local emergency number (999 UK, 112 EU, 911 US) or go to an emergency department straight away for feeling faint or light-headed, vomiting, blood in your pee, vomit or stool, pain spreading to the right shoulder, or belly pain that keeps going or gets worse, even hours later. Pain that eases does not rule an injury out. Do not stay alone, and do not drive yourself: ask someone to drive you or call an ambulance.[8,9,10,11,12,13,14]
This page is general information, not medical advice. If you think you are hurt, see a doctor. Where your gym or governing body has stricter rules, follow them.