diff --git a/lib/Parser/DocumentParser.php b/lib/Parser/DocumentParser.php
index 05eff2c5..015544bc 100644
--- a/lib/Parser/DocumentParser.php
+++ b/lib/Parser/DocumentParser.php
@@ -274,6 +274,13 @@ private function parseLine(string $line): bool
                         return false;
                     }
 
+                    if ($this->lineChecker->isComment($line)) {
+                        $this->flush();
+                        $this->setState(State::COMMENT);
+
+                        return false;
+                    }
+
                     if ($this->parseLink($line)) {
                         return true;
                     }
@@ -426,8 +433,6 @@ private function parseLine(string $line): bool
                 break;
 
             case State::COMMENT:
-                $isComment = false;
-
                 if (! $this->lineChecker->isComment($line) && (trim($line) === '' || $line[0] !== ' ')) {
                     $this->setState(State::BEGIN);
 
diff --git a/lib/Parser/LineChecker.php b/lib/Parser/LineChecker.php
index f825f869..62dbb184 100644
--- a/lib/Parser/LineChecker.php
+++ b/lib/Parser/LineChecker.php
@@ -109,12 +109,12 @@ public function isListLine(string $line, ?string &$listMarker = null, ?int &$lis
      */
     public function isBlockLine(string $line, int $minIndent = 1): bool
     {
-        return trim($line) === '' || $this->isIndented($line, $minIndent);
+        return (trim($line) === '' || $this->isIndented($line, $minIndent)) && ! $this->isComment($line);
     }
 
     public function isComment(string $line): bool
     {
-        return preg_match('/^\.\. (.*)$/mUsi', $line) > 0;
+        return preg_match('/^\.\.(?: [^_]((?:(?!::).)*))?$/mUsi', $line) > 0;
     }
 
     public function isDirective(string $line): bool
diff --git a/tests/Functional/tests/render/comment-empty/comment-empty.html b/tests/Functional/tests/render/comment-empty/comment-empty.html
new file mode 100644
index 00000000..9ba15270
--- /dev/null
+++ b/tests/Functional/tests/render/comment-empty/comment-empty.html
@@ -0,0 +1,4 @@
+<p>this is not a comment</p>
+<blockquote>
+    <p>this is a blockquote</p>
+</blockquote>
diff --git a/tests/Functional/tests/render/comment-empty/comment-empty.rst b/tests/Functional/tests/render/comment-empty/comment-empty.rst
new file mode 100644
index 00000000..a712e419
--- /dev/null
+++ b/tests/Functional/tests/render/comment-empty/comment-empty.rst
@@ -0,0 +1,6 @@
+..
+this is not a comment
+
+..
+
+  this is a blockquote
diff --git a/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.html b/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.html
new file mode 100644
index 00000000..92b8ea63
--- /dev/null
+++ b/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.html
@@ -0,0 +1 @@
+<p>this is not a comment</p>
diff --git a/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.rst b/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.rst
new file mode 100644
index 00000000..2736751f
--- /dev/null
+++ b/tests/Functional/tests/render/comments-block-with-header/comments-block-with-header.rst
@@ -0,0 +1,3 @@
+.. header comment
+   this is a comment
+this is not a comment
diff --git a/tests/Functional/tests/render/comments-block/comments-block.html b/tests/Functional/tests/render/comments-block/comments-block.html
new file mode 100644
index 00000000..92b8ea63
--- /dev/null
+++ b/tests/Functional/tests/render/comments-block/comments-block.html
@@ -0,0 +1 @@
+<p>this is not a comment</p>
diff --git a/tests/Functional/tests/render/comments-block/comments-block.rst b/tests/Functional/tests/render/comments-block/comments-block.rst
new file mode 100644
index 00000000..243ffebd
--- /dev/null
+++ b/tests/Functional/tests/render/comments-block/comments-block.rst
@@ -0,0 +1,3 @@
+..
+  this is a comment
+this is not a comment
diff --git a/tests/Parser/LineCheckerTest.php b/tests/Parser/LineCheckerTest.php
index 64160002..690fbe6d 100644
--- a/tests/Parser/LineCheckerTest.php
+++ b/tests/Parser/LineCheckerTest.php
@@ -56,7 +56,15 @@ public function testIsBlockLine(): void
     public function testIsComment(): void
     {
         self::assertTrue($this->lineChecker->isComment('.. Test'));
+        self::assertTrue($this->lineChecker->isComment('..'));
+        self::assertTrue($this->lineChecker->isComment('.. with _ underscore'));
+        self::assertTrue($this->lineChecker->isComment('.. with : colon'));
+        self::assertTrue($this->lineChecker->isComment('.. can finish with colon:'));
+
         self::assertFalse($this->lineChecker->isComment('Test'));
+        self::assertFalse($this->lineChecker->isComment('.. _should not start with underscore'));
+        self::assertFalse($this->lineChecker->isComment('.. should not finish with double colon::'));
+        self::assertFalse($this->lineChecker->isComment('.. should contain::double colon'));
     }
 
     public function testIsDirective(): void