just my opinion - a sign would be that you can't financially keep up with the needs of bodybuilding. we all know and let's face it - is pretty pricey.
another sign - instead of it bettering your life, it starts of ruining it. is highly individual.
a symptom - you are meant to feel better/ more confident/ look better/ be healthier etc. but you start feeling worse and worse, not feeling/ looking as you would love to. constant pains/ depression/ anxiety / insomnia etc. there are a lot of symptoms.
not sure though... i guess is individual