Look at my images on the forum, I also have fordyce spots. There is a good chance they will disappear once your lips are done healing, I'm hoping this is the case for me.
I apply coconut oil 15-20 times a day. Dab it on with a finger. At warmer temperatures it is a liquid and easy to apply. You must keep applying it and being careful when eating and washing your face not to disturb the area.
It is not dehydration it is because you have bitten off the under layers of skin in some areas which is needed for other areas of skin to attach. If you leave on any scabs that form you will notice that the lips do not feel dehydrated anymore. Keep them on, don't bite them off.