Spinal Manipulation

Last reviewed October 2026 · Based on 7 studies

Bottom line

Spinal manipulation eases back pain and improves function by modest amounts, with results similar to recommended treatments for chronic back pain. Serious harms are rare but reported, mostly after neck manipulation.

What it helps with

Eases chronic low back pain — Benefit, evidence grade B (Moderate). BMJ meta-analysis of 47 RCTs (9,211 people) plus a 2018 review; downgraded for unexplained heterogeneity, and benefit is small; sham data low quality.
Improves back function in chronic low back pain — Benefit, evidence grade B (Moderate). Consistent gains across two meta-analyses, but small effects and unexplained heterogeneity (I2 78% in one review) downgrade the grade.
Eases acute low back pain — Benefit, evidence grade B (Moderate). Meta-analysis of 15 RCTs judged moderate quality by the authors; downgraded for large unexplained heterogeneity.
Can cause serious injury, such as artery damage — Harm, evidence grade C (Limited). Systematic reviews of case reports and series; the events are rare and no incidence rate or comparison group exists.

What it is

Spinal manipulative therapy (SMT) is a hands-on treatment of the spine, which includes manipulation and mobilisation [1].

What the research says

For chronic low back pain, a 2019 BMJ meta-analysis of 47 trials (9,211 people) found pain relief similar to recommended treatments, and small, not clinically better pain relief than less effective options [1]. Function improved slightly more than with recommended treatments [1]. A 2018 review of 51 trials found manipulation reduced pain and disability more than other active treatments [2].

For acute low back pain (up to 6 weeks), a 2017 JAMA meta-analysis of 15 trials (1,711 people) found about 10 points of pain relief on a 100-point scale, and modest function gains across 12 trials [3].

Doses used in studies

Chronic back pain trials mostly enrolled adults aged about 35 to 60 [1]. The abstracts read for this page did not report session counts or doses, so the dose used in each trial is not stated here.

Safety and interactions

Mild, transient side effects such as increased pain, muscle stiffness and headache were reported in 50% to 67% of patients in large case series [3]. In one study of 183 people, the risk of an adverse event was not significantly higher than with sham manipulation [1]. One serious adverse event in one trial was judged possibly related to SMT [1]. Most serious adverse events reported after cervical spine manipulation were arterial, and many followed manipulation [4]. The incidence of artery dissection after neck manipulation is unknown, because no epidemiological studies were found [5]. The abstracts read for this page did not report data on pregnancy, interactions with medicines or upper limits.

Caveats and open questions

Results varied widely between trials and could not be explained [1]. Sham-controlled evidence is low to very low quality [1]. The 2019 review excluded trials of sciatica alone [1]. Some of its authors are chiropractors who received grants from chiropractic associations [1].