That's ^ ^ ^ what I'd do- keep an eye on it (which you'll do while applying the medication anyway). Vet visits can be costly, but more than that, they stress your snake, & sometimes a snake that's eating & doing well may stop eating due to the stress, which in turn works against the function of their immune system, which they need to heal an infection. I have no "crystal ball" to foresee the "right" answer- I'm just weighing the pro's & con's.