standard retic stuff. Shes just pushing hard, and this is what happens when they do. The upper lip will swell, the bottom lip will bend in and look smaller. If its chronic it can deform her face over time, so be cautious of constant pushers. Maybe see what's going on that she pushes so much - in many cases giving a taller or larger cage will fix this. Double check that both sides of your cage are proper temps (if one sides too hot and the other side is hot enough, it may cause the snake to constantly try and escape, likewise too cold and it may try and seek out warmth).
As noted, use betadine to treat. When my big girls push from time to time I just add a couple drops of betadine to their large water bowls, and change the water daily. This why its applied as they drink. Use a cotton swab and apply directly to the affected areas as needed as well.
If you have your tic in a tub, may want to move it into a PVC enclosure with more height, this will help pushing tics. When my girls push their bottom lip in, I normally give them an extra meal (smaller than normal) to help her stretch everything back. For snakes that WILL NOT stop pushing. Double check you are feeding them enough. My tiger girl needed to be fed a slightly larger than normal meal to get her to stop pushing after all the transitions I made.
Hope this helps.