diff --git a/compiler/rustc_borrowck/src/region_infer/graphviz.rs b/compiler/rustc_borrowck/src/region_infer/graphviz.rs
index a3e29982e90f..899dde9ecd47 100644
--- a/compiler/rustc_borrowck/src/region_infer/graphviz.rs
+++ b/compiler/rustc_borrowck/src/region_infer/graphviz.rs
@@ -41,7 +41,21 @@ fn render_region_vid<'tcx>(
         "".to_string()
     };
 
-    format!("{:?}{universe_str}{external_name_str}", rvid)
+    let extra_info = match regioncx.region_definition(rvid).origin {
+        NllRegionVariableOrigin::FreeRegion => "".to_string(),
+        NllRegionVariableOrigin::Placeholder(p) => match p.bound.kind {
+            ty::BoundRegionKind::Named(def_id) => {
+                format!("(p for {})", tcx.item_name(def_id))
+            }
+            ty::BoundRegionKind::ClosureEnv | ty::BoundRegionKind::Anon => "(p)".to_string(),
+            ty::BoundRegionKind::NamedAnon(_) => {
+                bug!("only used for pretty printing")
+            }
+        },
+        NllRegionVariableOrigin::Existential { .. } => "(ex)".to_string(),
+    };
+
+    format!("{:?}{universe_str}{external_name_str}{extra_info}", rvid)
 }
 
 impl<'tcx> RegionInferenceContext<'tcx> {