diff --git a/Routing-error-handlers.md b/Routing-error-handlers.md
index 5de7643..6b14477 100644
--- a/Routing-error-handlers.md
+++ b/Routing-error-handlers.md
@@ -42,19 +42,26 @@ func index(ctx iris.Context) {
 
 ## The Problem type
 
-Iris has a builtin support for the [Problem Details for HTTP APIs](https://tools.ietf.org/html/rfc7807).
+Iris has builtin support for the [Problem Details for HTTP APIs](https://tools.ietf.org/html/rfc7807).
 
-The `Context.Problem` sends a response like JSON but with indent of "  " and
-content type of "application/problem+json".
+The `Context.Problem` method sends a response like `Context.JSON` does but with indent of "  " and
+a content type of "application/problem+json" instead.
 
 ```go
 func newProductProblem(productName, detail string) iris.Problem {
     return iris.NewProblem().
-        Type("/product-error").
+        // The type URI, if relative it automatically convert to absolute.
+        Type("/product-error"). 
+        // The title, if empty then it gets it from the status code.
         Title("Product validation problem").
+        // Any optional details.
         Detail(detail).
+        // The status error code, required.
         Status(iris.StatusBadRequest).
+        // Any custom key-value pair.
         Key("productName", productName)
+        // Optional cause of the problem, chain of Problems.
+        // .Cause(other iris.Problem)
 }
 
 func fireProblem(ctx iris.Context) {
@@ -62,4 +69,16 @@ func fireProblem(ctx iris.Context) {
 }
 ```
 
+**Output**
+
+```json
+{
+  "type": "https://host.domain/product-error",
+  "status": 400,
+  "title": "Product validation problem",
+  "detail": "problem error details",
+  "productName": "product name"
+}
+```
+
 Full example can be found at [_examples/routing/http-errors](https://github.com/kataras/iris/blob/master/_examples/routing/http-errors/main.go).