oh gawd,
i had a lipoma for almost 20 years right on my spine. finally it started getting so big that it was showing.. so i went to a surgeon and had it cut out.
It was the noisiest operation. I kept cracking jokes because of all the noise
the surgeon was making cutting through gristle. "I'm a hen that would take hours to cook, talk about tough!"
He wasn't amused. he said i shouldn't have waited so long (and contradicted the doctor that said to wait)

Listen to Triskelion girl, she's right. They are finding that people recover from all sorts of back injuries on their own. Exercise with a focus on posture and core training might be all you need. As a bicyclist, you are already dedicated to fitness, so you can heal yourself.