What is the best option for a herniated disc? is it discectomy or fusion?

Usually diskectomy: In the majority of cases of low back disk herniation needing surgery, diskectomy is the best approach. In the neck, diskectomy combined with fusion is the best approach most of the time (in select cases neck diskectomy without fusion is a good option). Review your options with your provider. If in doubt, get a second opinion.

Depends on symptoms: Leg pain with disc herniation discectomy no symptoms niether, back ache be careful many disc bulges cause no syptoms fusion of asymptomatic MRI findings will just give you a scar and a sore back fusion is too much surgery for leg pain and a disc herniation fusion to treat back pain should be considered contraversial except with fracture instability from cancer.