Tessa has a good point on the doctor although all mine said was that he increased my dosage because I would need it.

For me it was very painful ...my one and only open me up back surgery ---the pain between the shoulder blades and I went back to work at 10 days and I don't think I healed until I quit working 6 months later.

It is such an individual decision...the pain over rides logical thought at times...read all you can.
Johanna