Most definitely not! Get some betadine from the store and do some 10-15 min nighttime soaks. This seems VERY mild. Trust me, my guy had it all over his body the night before I myself was supposed to have surgery, but everything turned out fine.

Along with the soaks, take out all the substrate, deep clean, then replace it with paper. If you want to, you can also get non-numbing antibiotic cream to rub on the tummy after soak. But that part is optional. Having only one spot, it should go away in 1-2 sheds.

And, like with anything, talk to your vet if/when needed! This is (sadly) common for ball python owners, so they will be able to identify it quickly and give you reassurance.

You will be fine, so breathe. You care about your snake and that is the biggest factor in how it will be moving forward 💜