What Happens If We Do Nothing About Scoliosis?

Written by: Dr. Justin Dick, DC

Clinical focus: Non-surgical scoliosis evaluation, spinal biomechanics, and radiographic analysis

Organization: Clear Life Scoliosis And Chiropractic Center

Research profile: Author and Publications 

Published: April 25, 2026

Last updated: April 25, 2026

Medically reviewed: April 25, 2026

Reviewed by: Corrine Holdridge, M.S.

Research and publications: Scoliosis Research Hub 

About this methodology: This page combines published research, educational interpretation, and clinic methodology for understanding scoliosis patterns. 

What to Know First The answer depends heavily on curve size, skeletal maturity, and growth remaining. Doing nothing is not the same as structured observation. Small curves in skeletally mature patients may remain stable for years. Larger curves in growing patients carry meaningful progression risk. Untreated scoliosis in adults is associated with pain, reduced function, and postural decline over time. 

Evidence Level on This Page Established evidence: curve progression risk is strongly associated with curve magnitude and skeletal maturity; natural history studies document long-term outcomes in untreated scoliosis. Emerging evidence: how compensation patterns and sagittal balance change over decades in untreated curves. Clinic methodology: the decision to observe rather than treat is interpreted within a whole-pattern, risk-stratified framework — not as passive inaction. "What happens if we do nothing?" is one of the most honest and important questions a patient or parent can ask. The answer is not the same for every person. It depends on who you are, what stage of growth you are in, and what your curve looks like right now (1, 2). 

Direct Answer For some patients, structured observation is entirely appropriate. For others, doing nothing carries real and documented risk. The difference comes down to curve size, skeletal maturity, and growth remaining. 

Why This Question Deserves a Real Answer Patients are often told to "watch and wait" without being told what they are watching for, how long to wait, or what the actual data says about untreated curves. That is not good enough. This page gives you the honest framework. Start with understanding your scoliosis pattern if you have not already, because risk cannot be evaluated without knowing what kind of curve you are dealing with. 

What Does Natural History Research Actually Show? The natural history of scoliosis — meaning what happens without treatment — has been studied for decades. The clearest findings are: During growth, curves above a certain size have a meaningful risk of progression. The classic Lonstein and Carlson data found that curves of 20 to 29 degrees in growing patients had a 68% progression rate, while curves under 19 degrees had a 22% progression rate (2). After skeletal maturity, curves below 30 degrees tend to remain stable in most patients (3). Curves between 30 and 50 degrees at skeletal maturity showed modest progression over time — roughly 10 to 15 degrees over 40 years in the Iowa natural history study (3). Curves above 50 degrees at skeletal maturity are more likely to continue progressing into adulthood (3). That data does not mean every patient will progress. It means the probability of progression is meaningfully related to where you are starting from and how much growth remains (1, 2, 3). 

The Key Variable: Are You Still Growing? Growth is the single most important factor in progression risk. Scoliosis behaves very differently in a growing 12-year-old compared with a 35-year-old. For growing patients, the window of highest risk is real and time-sensitive. Reviews of adolescent idiopathic scoliosis management consistently emphasize that skeletal maturity is central to risk stratification (4, 5). For skeletally mature patients, the urgency is lower in most cases — but it is not zero, and it depends on curve size at maturity. For the full framework on how growth affects risk, read progression, compensation, and change over time. 

Observation Is Not the Same as Doing Nothing This distinction matters enormously. Structured observation means: scheduled clinical follow-up at defined intervals repeat imaging when clinically indicated clear criteria for when the approach changes active monitoring of growth status and curve behavior Doing nothing means none of that is happening. When a clinician recommends observation, that is a clinical strategy. When a patient simply stops seeking care and hopes for the best, that is a different situation entirely — and it carries risk that structured observation does not. For what structured monitoring looks like in practice, see bracing, rehabilitation, and monitoring. 

What Are the Actual Long-Term Risks in Adults? The Iowa natural history study, which followed patients with untreated idiopathic scoliosis for an average of 50 years, found that adults with scoliosis reported more back pain than the general population, more self-consciousness about appearance, and some functional limitations — but that most were working and living independently (3). That is encouraging in one sense. But it does not mean untreated scoliosis is benign. It means outcomes vary. Larger curves, particularly thoracic curves above 80 to 90 degrees, were associated with greater functional limitation and, in some cases, pulmonary concerns (3). In adults, scoliosis can also progress due to degenerative change, not just growth. That is discussed in more detail in adult scoliosis: pain, balance, and function. 

What About Teens and Children Specifically? For growing patients, the cost of doing nothing is potentially higher because the window for intervention — particularly bracing — is time-limited. The BrAIST trial demonstrated that bracing significantly reduced progression to the surgical threshold in selected high-risk adolescents (4). That benefit disappears once growth is complete. A patient who reaches skeletal maturity with a 50-degree curve because no one acted during the growth period has lost an opportunity that cannot be recovered. Parents reading this page will find more context at teen scoliosis: what parents should know. 

When Is Observation Actually the Right Choice? Observation is clinically appropriate in several scenarios: Small curves (under 20 to 25 degrees) in growing patients with low progression risk may be monitored rather than immediately treated, with clear follow-up planned. Small to moderate curves in skeletally mature patients may be stable for extended periods without structural intervention. Patients who have completed growth with curves below the surgical threshold and without significant symptoms may appropriately be followed rather than treated aggressively. The SOSORT guidelines support a risk-stratified approach in which observation, bracing, and rehabilitation are matched to the individual patient's risk profile (8). The difference between appropriate observation and negligent inaction is whether there is a plan, a follow-up schedule, and a clear understanding of what would change the approach. 

What Happens to Compensation Over Time? Even when curves do not progress dramatically on a Cobb angle measurement, the body's compensation patterns can shift over time. Posture, balance, fatigue tolerance, and movement efficiency may change as the spine ages within an already asymmetrical structure. That is why this page pairs naturally with movement and adaptation in scoliosis and why imaging alone does not always capture the full functional picture. 

Our Clinical Perspective We do not believe every scoliosis patient needs aggressive intervention. We do believe every scoliosis patient deserves an honest answer to the question of what their curve is likely to do if nothing changes. That answer requires knowing curve size, skeletal maturity, pattern, and growth status. Without that information, neither the patient nor the clinician is in a position to make a genuinely informed decision. If you have been told to "just watch it" without being told what you are watching for or when the plan would change, that is worth asking about. 

What This Means for You If you or your child has scoliosis and you are considering doing nothing, the most important questions are: How large is the curve right now? Is growth still occurring? What is the documented progression risk at this curve size and maturity level? What is the follow-up plan and what would change the approach? This matters because the risk of doing nothing is real for some patients and negligible for others — and the difference is not always obvious without a careful evaluation. 

When to Seek Urgent Medical Attention Seek prompt medical evaluation if scoliosis or spinal symptoms are accompanied by: sudden or rapidly worsening weakness new bowel or bladder changes severe unrelenting pain major balance decline acute neurological changes fever or unexplained weight loss 

Frequently Asked Questions What happens if scoliosis is left untreated? It depends on curve size, skeletal maturity, and growth remaining. Small curves in skeletally mature patients may remain stable for years. Larger curves in growing patients carry a meaningful risk of progression. The risk of doing nothing is not the same for every patient (1, 2, 3). 

Can scoliosis get worse without treatment? Yes. Scoliosis can progress, especially in growing patients with larger curves. The classic Lonstein and Carlson data show that progression risk increases substantially with curve magnitude and remaining growth (2). 

Is observation the same as doing nothing? No. Structured observation is an active clinical strategy with scheduled follow-up, repeat imaging when appropriate, and defined criteria for escalation. It is not the same as ignoring the condition (8). 

When is doing nothing actually appropriate? In small curves in skeletally mature patients, structured observation may be entirely appropriate. The key is that the decision is made deliberately, with a clear understanding of curve size, maturity, and follow-up plan (1, 5, 8). 

What are the long-term risks of untreated scoliosis? Long-term risks in adults with untreated scoliosis may include progressive deformity, back pain, reduced function, postural change, and in larger curves, reduced quality of life. Pulmonary compromise is a concern primarily in very large thoracic curves (3). 

Does every untreated curve eventually need surgery? No. Many curves, particularly smaller ones in adults past skeletal maturity, remain stable without surgery. Surgical consideration depends on curve size, rate of progression, symptoms, and functional burden (6, 7). 

Related Pages in This Series Understanding your scoliosis pattern Progression, compensation, and change over time Bracing, rehabilitation, and monitoring Conservative care: what it may and may not change When surgery is considered Teen scoliosis: what parents should know Adult scoliosis: pain, balance, and function Movement and adaptation in scoliosis How scoliosis is measured Scoliosis Research Hub 

References 

1. Weinstein SL, Dolan LA, Cheng JCY, Danielsson A, Morcuende JA. Adolescent idiopathic scoliosis. Lancet. 2008;371(9623):1527-1537. PMID: 18456103 

2. Lonstein JE, Carlson JM. The prediction of curve progression in untreated idiopathic scoliosis during growth. J Bone Joint Surg Am. 1984;66(7):1061-1071. PMID: 6480635 

3. Weinstein SL, Dolan LA, Spratt KF, Peterson KK, Spoonamore MJ, Ponseti IV. Health and function of patients with untreated idiopathic scoliosis: a 50-year natural history study. JAMA. 2003;289(5):559-567. PMID: 12578488 

4. Weinstein SL, Dolan LA, Wright JG, Dobbs MB. Effects of bracing in adolescents with idiopathic scoliosis. N Engl J Med. 2013;369(16):1512-1521. PMID: 24047455 

5. Johnson MA, Flynn JM, Anari JB, Gohel S, Cahill PJ, Winell JJ, Baldwin KD. Risk of scoliosis progression in nonoperatively treated adolescent idiopathic scoliosis based on skeletal maturity. J Pediatr Orthop. 2021;41(9):543-548. PMID: 34354032 

6. Hresko MT. Idiopathic scoliosis in adolescents. N Engl J Med. 2013;368(9):834-841. PMID: 23445094 

7. Jinnah AH, Lynch KA, Wood TR, Hughes MS. Adolescent Idiopathic Scoliosis: Advances in Diagnosis and Management. Curr Rev Musculoskelet Med. 2025;18(2):54-60. PMID: 39738882 

8. Negrini S, Donzelli S, Aulisa AG, et al. 2016 SOSORT guidelines: orthopaedic and rehabilitation treatment of idiopathic scoliosis during growth. Scoliosis Spinal Disord. 2018;13:3. PMID: 29435499