The blushing and flames do typically come out more and more with each shed, so it could be something that started much smaller and has gradually grown and lightened over time. I would definitely keep an eye on it if it's something you're noticing as being different than before.

There are a lot of tips to try to get non-feeders or stubborn feeders to go. What are you currently trying to feed? Frozen/thawed, live, prekilled? And mice, rats, ASF? Has anything about the enclosure been changed recently, or right before your snake stopped eating? A lot of feeding issues turn out to be problems with the environment causing stress for the snake, which can make a ball python stop eating pretty quickly. If you normally feed frozen/thawed, you may want to consider trying a live feeding. I would recommend going a little smaller in size than what your bp is used to eating, but live food will often trigger the feeding response, then you can try to go back to frozen after they are eating again. There are some other tips and tricks, like rubbing used mouse bedding on the thawed rat just to get a different prey smell going. I've also read that you can dip a thawed rat into chicken broth and that's had some success. Ultimately, keep trying once a week and when your snake gets hungry enough, it'll eat...