Basic Example Bootstrap includes validation styles for error, warning, and success states on form controls. To use, add .has-warning, .has-error, or .has-success to the parent element. Any .control-label, .form-control, and .help-block within that element will receive the validation styles.

This is a successfull help block
This is a warning help block
This is an error help block

Validation Stats with Icon You can also add optional feedback icons with the addition of .has-feedback and the right icon.