She won't stop licking - is something wrong?

by Amanda
(Sheerness, UK)

Details of your Schnauzer(s): Hi I don't know if you would be able to help, I have a 6 year old schnauzer. When i give her her food, she will eat it then start going mad, running after me and jumping up and licking.

She wont leave me alone, that will last for about 20 minutes. I don't know why she does it. Could there be something wrong with her? She is constantly licking me and going mad, as if there is something wrong.
I hope you can help me.