diff --git a/server/app.py b/server/app.py
index a879550..3a48159 100644
--- a/server/app.py
+++ b/server/app.py
@@ -1169,6 +1169,46 @@ def api_media_element(media_id: int) -> ResponseReturnValue:
         }, 405
 
 
+@flask_app.route("/api/media/add_blocking", methods=["POST"])
+def api_media_add_blocking() -> ResponseReturnValue:
+    data = request.form.to_dict()
+    blocked_by_id = data.get("blocked_by")
+    is_blocking_id = data.get("is_blocking")
+    blocked_by: Optional[MediaElement] = (
+        MediaElement.get(id=blocked_by_id) if blocked_by_id else None
+    )
+    is_blocking: Optional[MediaElement] = (
+        MediaElement.get(id=is_blocking_id) if is_blocking_id else None
+    )
+    if not blocked_by or not is_blocking:
+        return {
+            "status": False,
+            "error": f"Object not found",
+        }, 404
+    blocked_by.is_blocking.add(is_blocking)
+    return redirect_back_or_okay()
+
+
+@flask_app.route("/api/media/remove_blocking", methods=["POST"])
+def api_media_remove_blocking() -> ResponseReturnValue:
+    data = request.form.to_dict()
+    blocked_by_id = data.get("blocked_by")
+    is_blocking_id = data.get("is_blocking")
+    blocked_by: Optional[MediaElement] = (
+        MediaElement.get(id=blocked_by_id) if blocked_by_id else None
+    )
+    is_blocking: Optional[MediaElement] = (
+        MediaElement.get(id=is_blocking_id) if is_blocking_id else None
+    )
+    if not blocked_by or not is_blocking:
+        return {
+            "status": False,
+            "error": f"Object not found",
+        }, 404
+    blocked_by.is_blocking.remove(is_blocking)
+    return redirect_back_or_okay()
+
+
 def _api_media_set_x(call: Callable[[MediaElement], Any]) -> ResponseReturnValue:
     data = request.form.to_dict()
     ids = _parse_cs_ids(data.get("ids", "NULL"))
diff --git a/server/templates/media_element.htm b/server/templates/media_element.htm
index 80947b9..0aeec0f 100644
--- a/server/templates/media_element.htm
+++ b/server/templates/media_element.htm
@@ -81,6 +81,52 @@
                         <li>{{ link.uri | as_link }} {% if element.uri == link.uri %}*{% endif %}</li>
                     {% endfor %}
                 </ul>
+                <h2>Blocked By</h2>
+                <form class="form-single-button" action="/api/media/add_blocking" method="post">
+                    {{ macros.hidden_redirect_back() }}
+                    <input type="hidden" name="is_blocking" value="{{ element.id }}" />
+                    <input type="number" name="blocked_by" />
+                    <button type="submit">
+                        add
+                    </button>
+                </form>
+                {% if element.blocked_by %}
+                    <div class="thumbnail_list">
+                        {% for sub_elem in element.blocked_by %}
+                            {% call macros.media_thumbnail_view(
+                                element=sub_elem,
+                                check_considered=True,
+                            ) %}
+                                {% call macros.post_form("/api/media/remove_blocking", "blocked_by", sub_elem.id|string, "X") %}
+                                    <input type="hidden" name="is_blocking" value="{{ element.id }}" />
+                                {% endcall %}
+                            {% endcall %}
+                        {% endfor %}
+                    </div>
+                {% endif %}
+                <h2>Is Blocking</h2>
+                <form class="form-single-button" action="/api/media/add_blocking" method="post">
+                    {{ macros.hidden_redirect_back() }}
+                    <input type="hidden" name="blocked_by" value="{{ element.id }}" />
+                    <input type="number" name="is_blocking" />
+                    <button type="submit">
+                        add
+                    </button>
+                </form>
+                {% if element.is_blocking %}
+                    <div class="thumbnail_list">
+                        {% for sub_elem in element.is_blocking %}
+                            {% call macros.media_thumbnail_view(
+                                element=sub_elem,
+                                check_considered=True,
+                            ) %}
+                                {% call macros.post_form("/api/media/remove_blocking", "is_blocking", sub_elem.id|string, "X") %}
+                                    <input type="hidden" name="blocked_by" value="{{ element.id }}" />
+                                {% endcall %}
+                            {% endcall %}
+                        {% endfor %}
+                    </div>
+                {% endif %}
             </div>
         </div>
     </body>