What are the typical risks of spine surgery?

Every operation carries some risk, and spine surgery is no exception. A clear understanding of those risks is not a reason for alarm but a necessary part of an informed decision — the same decision, weighed together with the surgeon, that the rest of this section has described. It is also worth keeping in perspective: the large trials comparing surgical and non-operative care for common conditions such as disc herniation have generally found serious complications to be uncommon in the surgical groups.¹ The goal here is to name the real categories of risk honestly, so that they can be discussed concretely for an individual situation.

The first category is the set of general risks common to any surgery. These include the risks of anesthesia, bleeding, and infection at the surgical site, as well as the risks of blood clots in the legs or lungs that accompany any operation involving a period of reduced mobility. These risks are not unique to the spine, and much of routine surgical and anesthetic care — from antibiotics to early mobilization — is organized specifically around reducing them. A person's general health, age, and other medical conditions influence this category considerably, which is why a thorough preoperative assessment matters.

The second category is risk specific to operating near the spine and its nerves. Because the surgery takes place close to the dura — the membrane surrounding the nerves and spinal fluid — one recognized possibility is a dural tear, which can allow spinal fluid to leak and sometimes requires repair or a short period of additional recovery. There is also a small risk of nerve injury, which can result in new numbness, weakness, or pain; serious neurological injury is uncommon but is the risk patients most often worry about, and it is reasonable to discuss it directly. When the operation involves implants, there are additional considerations such as hardware position, and when it involves fusion, the bone may occasionally fail to fully unite. The specific spine-related risks depend heavily on which operation is being performed and on the individual anatomy.

A third category concerns the outcome itself: even a technically successful operation does not guarantee complete relief. Symptoms may improve only partially, may take time to settle, or — in the case of conditions like disc herniation — may recur at the same or a different level over the years that follow. This is part of why surgery for most degenerative conditions is considered elective and is weighed against continued conservative care rather than presented as a guaranteed cure.² Setting realistic expectations about what an operation can and cannot achieve is as important as understanding its technical risks.

The purpose of laying out these categories is not to discourage surgery but to place it in proper context. For many people with appropriate indications, the likely benefit of surgery outweighs these risks; for others, the balance favors continued non-operative care. That balance can only be struck for a specific person, taking into account the severity of their symptoms, their diagnosis, their general health, and their own priorities. The most useful conversation to have with a surgeon is therefore not whether spine surgery has risks — every operation does — but “what are the specific risks in my case, how likely are they, and how do they compare with the risks of not operating?” That is the question that turns a general list of risks into a decision that fits the individual.