Clean it up and don't let it get infected. If it doesn't bother you then you will be good to go.
Injuries and illnesses do happen before R-Day.
One of my daughter's classmates at MMI tore out his knee 3 weeks before R-Day. He was deferred to the following year.
On tragedy I recall a few years back was a young lady who was seriously injured in a bike accident a few months prior to R-day.
IF you get sick while traveling or upon arrival in Highland falls - CALL admissions! They will help you! A young lady in my daughter's class got sick while traveling with her family - the morning prior she woke up with a fever, they called admissions who got her into Keller (they were in HF) she was treated with antibiotics and able to report.
If you become sick and are antibiotics - e.g strep throat; dont' forget to take your medicine with you! Don't ignore it a risk a relapse!
The bottom line - if ANYTHING happens to you; call admissions! They really really will help you as best they can.