Issue #3854: Documented using the sqlite3 module with multiple threads.
diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst
index 439ca23..cf38373 100644
--- a/Doc/library/sqlite3.rst
+++ b/Doc/library/sqlite3.rst
@@ -880,3 +880,18 @@
committed:
.. literalinclude:: ../includes/sqlite3/ctx_manager.py
+
+
+Common issues
+-------------
+
+Multithreading
+^^^^^^^^^^^^^^
+
+Older SQLite versions had issues with sharing connections between threads.
+That's why the Python module disallows sharing connections and cursors between
+threads. If you still try to do so, you will get an exception at runtime.
+
+The only exception is calling the :meth:`~Connection.interrupt` method, which
+only makes sense to call from a different thread.
+