Evie, as with any medication, you use it until the condition clears up and even afterward as a prophylactic against it reoccurring. You pee into something and then massage the urine into the affected area once a day. Don't do it more often than this, as the uric acid could possibly irritate a sensitive skin. Rub it in for a minute or so and then wash it off. The skin will absorb what it needs and no more.
Here is the link you need for the honey treatment
http://www.wikihow.com/Treat-a-Burn-Using-Honey
Love,
Old Fart