I had a small boa once get her head stuck in the round loop at the end of some plastic plants (I now make sure to cut those ahead of time). I could not push her head out of it so I had to get scissors and cut it off which squished her head even more. She ended up with dark marks on the sides of her face where the loop had been (probably similar to the red line marks you see on yours). They faded a bit with time but never fully went away.
The other advise given about the squeezing is good, see how she moves. You can take her to a vet for xray, prices vary but it's not too bad from some vets.
I hope your little one is okay!
