Lower back pain is a recognized symptom of COVID-19, reported by roughly one in five to one in four hospitalized patients during acute infection. It ranks among the top three new-onset pain complaints alongside generalized muscle aches and headaches. But the relationship between SARS-CoV-2 and back pain turns out to be more layered than a simple yes, with the virus apparently able to trigger pain through several distinct biological routes and, for some people, to amplify back problems that linger long after the infection clears.
How Common Is Lower Back Pain During Acute COVID-19
Among hospitalized COVID-19 patients, about 23% developed new-onset lower back pain, making it the third most frequent pain symptom after generalized muscle pain (about 33%) and headache (about 27%).1PubMed Central. Musculoskeletal and Neurological Pain Symptoms Among Hospitalized COVID-19 Patients Those figures come from patients sick enough to be admitted to a hospital, so they likely reflect moderate-to-severe cases. A broader community-based study that included people who recovered at home found that about 24% of individuals with post-acute COVID-19 reported lower back pain, compared with roughly 16% of people who had not been infected, a statistically significant gap.2PubMed Central. SARS-CoV-2 infection is associated with low back pain: findings from a community-based case-control study Of those who did report lower back pain, the vast majority said the pain was either entirely new or a clear worsening of a pre-existing problem that coincided with their infection.
Reviews grouping musculoskeletal complaints together list fatigue, muscle and joint pain, back pain, and lower back pain among the major symptoms of COVID-19.3PubMed Central. Musculoskeletal involvement: COVID-19 and post COVID 19 A separate review estimated that acute pain of some kind accompanies anywhere from 20% to over 60% of hospitalized COVID-19 cases, with spinal pain mentioned as a second-tier complaint behind muscle aches, headache, and sore throat.4PubMed Central. Chronic pain and infection: mechanisms, causes, conditions, treatments, and controversies So while lower back pain is not the hallmark symptom people associate with COVID (fever and cough still own that distinction), it is common enough that clinicians have come to expect it.
Why the Virus Causes Back Pain
There is no single mechanism. Researchers have identified at least two major pathways, and they probably work together in many patients.
The first is the body’s own inflammatory response. When SARS-CoV-2 replicates rapidly, the immune system can flood the bloodstream with inflammatory signaling molecules. Among them, interleukin-6 (IL-6) plays a central role: it acts on muscle tissue and triggers the production of compounds that sensitize pain receptors, which is why muscle aches during infections feel different from exercise soreness. Patients with severe COVID-19 tend to have elevated levels of IL-6 along with several other inflammatory molecules, and the intensity of those elevations tracks with disease severity.5Frontiers in Pain Research. A Review: The Manifestations, Mechanisms, and Treatments of Musculoskeletal Pain in Patients With COVID-19 In other words, the sicker you are, the more inflammatory fuel is available to irritate muscles and connective tissue throughout the body, including the lumbar spine region.
The second pathway is more direct and more unsettling. The virus enters human cells through a receptor called ACE2, and research on human sensory nerve tissue found that ACE2 is expressed by pain-sensing neurons in the dorsal root ganglia, the clusters of nerve cell bodies that sit along the spine.6PubMed Central. ACE2 and SCARF expression in human DRG nociceptors: implications for SARS-CoV-2 virus neurological effects Specifically, about 20–25% of sensory neurons in lumbar dorsal root ganglia showed ACE2 at the genetic level, and the neurons that expressed it were the kind dedicated to detecting pain. This raises the possibility that SARS-CoV-2 can interact with or infect the very nerve cells responsible for transmitting pain signals from the lower back.7PubMed Central. Neurobiology of SARS-CoV-2 interactions with the peripheral nervous system: implications for COVID-19 and pain The expression level seems to be low, which may explain why not everyone develops nerve-related pain, but the receptor is there.
When the Virus Aggravates an Existing Spine Problem
People who already had disc herniations or chronic radicular pain (pain that shoots down a leg because a nerve root is compressed) found that COVID-19 made things substantially worse. A case series documented patients with chronic lumbosacral radicular pain whose pain intensity jumped from a median of about 6 out of 10 to 8 out of 10 during their SARS-CoV-2 infection, a large and clinically meaningful increase.8PubMed Central. COVID-19 Worsens Chronic Lumbosacral Radicular Pain—Case Series Report The leading explanation is that viral infection or post-viral inflammation targeted the already-compromised dorsal root ganglia near the herniated discs, adding swelling and neural transmission changes on top of existing mechanical compression. The reassuring finding: for most of these patients, the flare-up was temporary. Pain levels dropped back to their pre-infection baseline once the infection resolved, and none required emergency surgery.
Rare cases have gone further. At least one documented case involved sciatic nerve damage attributed to COVID-19 in a patient who developed progressive leg weakness and pain, confirmed by nerve conduction studies, without any structural cause visible on imaging.9PubMed Central. COVID-19-Induced Left Sciatic Neuropathy Requiring Prolonged Physical Medicine and Rehabilitation That kind of isolated nerve injury is unusual, but it illustrates the range of ways the virus can affect the lower back and legs beyond simple muscle inflammation.
Lower Back Pain as a Long COVID Symptom
For some people, the back pain does not go away when the acute infection ends. In the post-COVID period, vertebral pain with radicular irritation has been described as resistant to standard conservative treatment, persisting for months after hospital discharge.10PubMed Central. Vertebral Algic Syndrome Treatment in Long COVID-Cases Reports A cross-sectional study of long COVID patients found that those who had required intensive care reported longer durations of lower back pain and were more likely to be bedridden due to fatigue and pain compared to patients who had milder acute illness.11Heliyon. Musculoskeletal symptoms in patients with long COVID: A cross-sectional study on Iranian patients
A large case-control study added another dimension: patients who experienced muscle pain during their acute COVID-19 illness had a higher likelihood of still having musculoskeletal pain seven months later compared to those who had not had muscle pain during the initial infection.4PubMed Central. Chronic pain and infection: mechanisms, causes, conditions, treatments, and controversies Half of individuals with pre-existing musculoskeletal pain reported a persistent worsening of their symptoms after COVID-19, and the presence of viral-induced muscle pain at hospital admission was associated with developing entirely new musculoskeletal pain syndromes as a long-term consequence.12Pain. Myalgia as a symptom at hospital admission by severe acute respiratory syndrome coronavirus 2 infection is associated with persistent musculoskeletal pain as long-term post-COVID sequelae The takeaway is that muscle pain during acute COVID appears to be a marker of risk for chronic pain afterward, not just a passing inconvenience.
A longitudinal study of healthcare workers tracked symptoms over several months and found that the proportion reporting pain (which included back pain among other types) increased by about 8 percentage points from the initial assessment to follow-up.13Nature. The longitudinal study of subjective wellbeing and absenteeism of healthcare workers considering post-COVID condition and the COVID-19 pandemic toll That trend suggests the pain burden may grow rather than shrink as time passes, at least in working populations dealing with the combined toll of infection and ongoing occupational stress.
Who Is More Vulnerable
Older adults with chronic back pain appear to be a particularly affected group. A cross-sectional study focusing on older adults found that about 19% of those with chronic back pain experienced a clear exacerbation of that pain after SARS-CoV-2 infection.14PubMed Central. Exacerbation of Pre-Existing Chronic Pain in Older Adults After SARS-CoV-2 Infection That rate may sound modest, but nearly one in five elderly back-pain patients getting worse represents a meaningful clinical burden, especially because these are people already managing a chronic condition.
Severity of the initial infection matters too. The evidence consistently points in the same direction: people who were sicker during their acute illness, who required ICU admission, or who had more intense muscle pain at the outset tend to have worse and longer-lasting back pain afterward. This likely reflects the intensity of the inflammatory response: a more severe infection produces a bigger cytokine surge, causing more tissue irritation and a greater chance of lasting sensitization of pain pathways.
The Quarantine Effect on Backs
Not all COVID-era back pain is directly caused by the virus itself. The pandemic created conditions that are practically designed to produce lower back pain: prolonged sitting, reduced physical activity, disrupted routines, and elevated stress. A cross-sectional study in Saudi Arabia found that during quarantine, about 74% of participants were mostly sedentary and exercised less than before. The prevalence of lower back pain jumped from roughly 45% before quarantine to about 59% during it, with significant associations between daily sitting time, reduced physical activity, and back pain.15PubMed Central. Lower Back Pain Caused by the Impact of COVID-19 Quarantine on Physical Activity and Daily Sitting Among Adult Saudi Arabian Populations in Jeddah: A Cross-Sectional Study
Sleep quality added another layer. A study in Turkey found that the strongest correlation between poor sleep and pain was specifically with lower back pain, and both poor sleep and back pain were tied to depression during the pandemic.16PubMed Central. The profile of musculoskeletal pain and its associations with sleep quality and depression during the COVID-19 in Turkey This creates a frustrating cycle: stress and disrupted sleep make back pain worse, and worsening back pain further disrupts sleep and mood. If you developed lower back pain during 2020 or 2021, it may be genuinely unclear whether the virus caused it, the lifestyle changes caused it, or both contributed. For many people, the honest answer is probably “some of each.”
Rare but Serious Complications
In a small number of cases, COVID-19 has been linked to complications that go well beyond typical muscle pain and produce severe lower back symptoms.
One is paraspinal myositis, or inflammation of the muscles running alongside the spine. A study using MRI found that about 78% of COVID-19 patients who underwent spinal imaging showed evidence of paraspinal muscle inflammation, visible as abnormal swelling and enhancement within the muscles.17PubMed Central. Paraspinal Myositis in Patients with COVID-19 Infection This was a small group of patients who had clinical reason to get spine MRIs, so it does not mean 78% of all COVID patients have this finding. But it does show that the virus can cause objective, measurable inflammation in back muscles, not just subjective pain reports.
Spondylodiscitis, an infection of the intervertebral disc and the vertebrae on either side of it, has also been reported after severe COVID-19. One case involved a 45-year-old man diagnosed with the condition eight weeks after hospital discharge for severe COVID-19 with respiratory failure. The proposed explanation involves the dysregulated immune response, blood vessel damage, and potential bacterial superinfection creating conditions for spinal infection to take hold.18PubMed Central. Post-COVID-19 Spondylodiscitis: A Case Study and Review of the Literature This is genuinely rare but worth knowing about: persistent, worsening lower back pain with fever weeks after a severe COVID case warrants medical imaging.
Rhabdomyolysis, a condition in which muscle tissue breaks down rapidly, has also been documented in COVID-19 patients presenting with lower back pain, muscle weakness, and difficulty walking.19PubMed Central. Rhabdomyolysis in a patient with end-stage renal disease and SARS-CoV-2 infection: A case report Rhabdomyolysis can cause kidney damage, so sudden severe back pain with dark urine during or after COVID-19 deserves urgent evaluation.
Can COVID-19 Vaccines Cause Lower Back Pain
This question comes up often, and the short answer is yes, but with important context. In a study of Iranian healthcare workers, about 27% reported lower back pain after COVID-19 vaccination, alongside more commonly reported side effects like injection-site pain, fatigue, and headache.20Clinical Epidemiology and Global Health. Neuro-musculoskeletal side effects related to COVID-19 vaccines; A cross sectional study in Iranian healthcare workers A survey-based study in Oman found that post-vaccination back pain tended to be intermittent, dull, and chronic in nature rather than a brief flare that resolved in a day or two.21Biomedical and Pharmacology Journal. Prevalence of Chronic Backpain after COVID-19 Astrazeneca and Pfizer/Biontech Vaccines in Sultanate of Oman: A Survey-Based Study
However, a study that directly compared lower back pain prevalence before COVID-19 and after vaccination found no statistically significant difference, suggesting the vaccination itself did not independently increase back pain risk above what already existed in that population.22PubMed Central. Increased Frequency of Low Back Pain in Recent Times: Does the Answer Lie in COVID-19? The picture is muddled. Vaccines activate the immune system on purpose, producing some of the same inflammatory molecules (like IL-6) that drive muscle pain during actual infection, just at a much lower level and for a shorter time. Some back pain after vaccination is expected and biologically explainable. Whether vaccines cause persistent lower back pain as opposed to a brief inflammatory flare remains unclear, and the evidence is weaker than for the infection itself.
Sorting Out What Is Actually Causing Your Back Pain
If you developed lower back pain during or after COVID-19, the origin could be the virus itself, the inflammatory response, a worsening of a pre-existing structural issue, the effects of prolonged bedrest and inactivity during recovery, poor sleep, psychological stress, or some combination. That ambiguity is frustrating but worth acknowledging, because the treatment approach depends on which factor is dominant.
Pain that appeared alongside fever and other acute COVID symptoms and gradually faded as you recovered was most likely driven by the systemic inflammatory response. Pain that started after a period of bedrest or quarantine inactivity and gets better with gentle movement likely has a deconditioning component. Pain that radiates down a leg and got dramatically worse during your infection may reflect nerve root inflammation, especially if you had a known disc issue before getting sick. And persistent, worsening back pain with neurological symptoms weeks after a severe case warrants imaging to rule out the rare complications described above.
For most people, COVID-related lower back pain improves as the infection resolves. The patients whose radicular pain spiked during illness mostly returned to their pre-infection baseline spontaneously. But a meaningful minority, particularly those with severe initial illness and pre-existing pain conditions, face a longer recovery. If your back pain has outlasted your other COVID symptoms by months, you are not imagining it and you are not alone. The mechanisms the virus uses to cause pain, from inflammatory signaling to potential direct nerve involvement, are real and well-documented enough that persistent post-COVID back pain deserves the same clinical attention as any other form of chronic pain.