diff --git a/cmd/uncloud/service/rm.go b/cmd/uncloud/service/rm.go
index 74c6a345..74263807 100644
--- a/cmd/uncloud/service/rm.go
+++ b/cmd/uncloud/service/rm.go
@@ -19,7 +19,12 @@ func NewRmCommand() *cobra.Command {
 		Use:     "rm SERVICE [SERVICE...]",
 		Aliases: []string{"remove", "delete"},
 		Short:   "Remove one or more services.",
-		Args:    cobra.MinimumNArgs(1),
+		Long: `Remove one or more services.
+
+The volumes used by the services are preserved and should be removed separately
+with 'uc volume rm'. Anonymous Docker volumes (automatically created from VOLUME
+directives in image Dockerfiles) are automatically removed with their containers.`,
+		Args: cobra.MinimumNArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			opts.services = args
diff --git a/website/docs/9-cli-reference/uc_rm.md b/website/docs/9-cli-reference/uc_rm.md
index f3198346..66b40de1 100644
--- a/website/docs/9-cli-reference/uc_rm.md
+++ b/website/docs/9-cli-reference/uc_rm.md
@@ -2,6 +2,14 @@
 
 Remove one or more services.
 
+## Synopsis
+
+Remove one or more services.
+
+The volumes used by the services are preserved and should be removed separately
+with 'uc volume rm'. Anonymous Docker volumes (automatically created from VOLUME
+directives in image Dockerfiles) are automatically removed with their containers.
+
 ```
 uc rm SERVICE [SERVICE...] [flags]
 ```
diff --git a/website/docs/9-cli-reference/uc_service_rm.md b/website/docs/9-cli-reference/uc_service_rm.md
index d1b966ad..d4f687c1 100644
--- a/website/docs/9-cli-reference/uc_service_rm.md
+++ b/website/docs/9-cli-reference/uc_service_rm.md
@@ -2,6 +2,14 @@
 
 Remove one or more services.
 
+## Synopsis
+
+Remove one or more services.
+
+The volumes used by the services are preserved and should be removed separately
+with 'uc volume rm'. Anonymous Docker volumes (automatically created from VOLUME
+directives in image Dockerfiles) are automatically removed with their containers.
+
 ```
 uc service rm SERVICE [SERVICE...] [flags]
 ```