diff --git a/Content.Shared/Blocking/BlockingSystem.cs b/Content.Shared/Blocking/BlockingSystem.cs
index 0392428c3c..ceeb236359 100644
--- a/Content.Shared/Blocking/BlockingSystem.cs
+++ b/Content.Shared/Blocking/BlockingSystem.cs
@@ -1,9 +1,12 @@
 using Content.Shared.Actions;
 using Content.Shared.Actions.ActionTypes;
 using Content.Shared.Buckle.Components;
+using Content.Shared.Doors.Components;
 using Content.Shared.Hands;
 using Content.Shared.Hands.EntitySystems;
 using Content.Shared.IdentityManagement;
+using Content.Shared.Maps;
+using Content.Shared.MobState.Components;
 using Content.Shared.Physics;
 using Content.Shared.Popups;
 using Content.Shared.Toggleable;
@@ -26,6 +29,7 @@ public sealed class BlockingSystem : EntitySystem
     [Dependency] private readonly SharedPopupSystem _popupSystem = default!;
     [Dependency] private readonly IMapManager _mapManager = default!;
     [Dependency] private readonly SharedContainerSystem _containerSystem = default!;
+    [Dependency] private readonly EntityLookupSystem _lookup = default!;
 
     public override void Initialize()
     {
@@ -128,12 +132,33 @@ public sealed class BlockingSystem : EntitySystem
 
         if (component.BlockingToggleAction != null)
         {
+            //Don't allow someone to block if they're in a container.
             if (_containerSystem.IsEntityInContainer(user) || !_mapManager.TryFindGridAt(xform.MapPosition, out var grid))
             {
                 CantBlockError(user);
                 return false;
             }
 
+            //Don't allow someone to block if someone else is on the same tile or if they're inside of a doorway
+            var playerTileRef = xform.Coordinates.GetTileRef();
+            if (playerTileRef != null)
+            {
+                var intersecting = _lookup.GetEntitiesIntersecting(playerTileRef.Value);
+                var mobQuery = GetEntityQuery<MobStateComponent>();
+                var doorQuery = GetEntityQuery<DoorComponent>();
+                var xformQuery = GetEntityQuery<TransformComponent>();
+
+                foreach (var uid in intersecting)
+                {
+                    if (uid != user && mobQuery.HasComponent(uid) || xformQuery.GetComponent(uid).Anchored && doorQuery.HasComponent(uid))
+                    {
+                        TooCloseError(user);
+                        return false;
+                    }
+                }
+            }
+
+            //Don't allow someone to block if they're somehow not anchored.
             _transformSystem.AnchorEntity(xform);
             if (!xform.Anchored)
             {
@@ -168,6 +193,12 @@ public sealed class BlockingSystem : EntitySystem
         _popupSystem.PopupEntity(msgError, user, Filter.Entities(user));
     }
 
+    private void TooCloseError(EntityUid user)
+    {
+        var msgError = Loc.GetString("action-popup-blocking-user-too-close");
+        _popupSystem.PopupEntity(msgError, user, Filter.Entities(user));
+    }
+
     /// <summary>
     /// Called where you want the user to stop blocking.
     /// </summary>
diff --git a/Resources/Locale/en-US/actions/actions/blocking.ftl b/Resources/Locale/en-US/actions/actions/blocking.ftl
index cc58e59610..123a5991d4 100644
--- a/Resources/Locale/en-US/actions/actions/blocking.ftl
+++ b/Resources/Locale/en-US/actions/actions/blocking.ftl
@@ -8,3 +8,5 @@ action-popup-blocking-other = {CAPITALIZE(THE($blockerName))} raises {POSS-ADJ($
 action-popup-blocking-disabling-other = {CAPITALIZE(THE($blockerName))} lowers {POSS-ADJ($blockerName)} {$shield}!
 
 action-popup-blocking-user-cant-block = You tried to raise your shield, but it was no use.
+action-popup-blocking-user-too-close = There's no room here to block. Try moving a bit!
+