Your lips will probably be irritated for a while, plus the Protopic adds to the irritated feeling. I have noticed that sometimes I have used the Protopic once and my lips felt irritated up to six hours later.
You need to be patient. I can't stress this enough.
Everyone is different.
As I said it took almost a year for my occassional signs of irritation to completely go away. (now I just peel remember)
I'd go through periods where I wasn't red and periods where I was. Depending on how I looked if would decrease my daily application of Protopic.
I believe the medication indicates that you should continue using it up to two weeks after all signs of irritation go away.
In terms of foods, if you are irritated right now, stay away from anything overly spicy or acidic since it could exacerbate the situation.
Try drinking liquids out of straw too. It will help.
If you'd like I can give you the website for an all natural lip balm that I love. I find it is more moisturizing then Vaseline or Aquaphor and not as goopy.
Send me a personal message if you are interested.
Keep in touch and hope to see you around.