I don't think so? I have a boa with similar spots. What is the morph of your boa? Looks kinda like a salmon to me, just like me. Id say it just looks like normal patterning to me.
1.0 Normal BP
1.0 Mainland Reticulated
1.0 High lines Red Tail Boa
It's normal. They can get more pronounced as the snake gets older. Here is Rosey who is 5 years old and she has lots of that white/pink down her sides. Kind of hard to see here but if you look where the bend is, you can see some of it.
0.1 Rio Bravo Pokigron Suriname BC-Gina
1.0 Meltzer/Lincoln Peruvian Longtail het anery BCL-Louie
0.1 Biak Green Tree Python-Pat 1.0 OSHY Biak Green Tree Python-Alex
0.0.1 Super Reduced Reticulated Gila Monster-Dozer
0.0.1 Utah Banded Gila Monster-Tank
0.0.1 Super Black Beaded Lizard-Reggie