Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

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Two people can have the same MRI, the same desk job, and the same posture, yet report wildly different levels of shoulder and neck pain. Part of that gap is structural. A large part of it is biological — written into the genes that shape how your nervous system builds, transmits, and interprets pain signals. Understanding those genetic factors is the first step toward a pain-management plan that fits you rather than the average patient.

Why shoulder and neck pain varies so much from person to person

Pain is not a simple readout of tissue damage. It is an interpretation the brain and spinal cord assemble from many inputs: mechanical strain in the trapezius and cervical muscles, inflammatory signaling, prior injury, stress, and sleep. Genetics tunes several of these dials at once. Some people inherit a nervous system that amplifies pain signals; others dampen them. This is why identical shoulder strain can feel like a minor ache to one person and a persistent, radiating problem to another.

COMT and the biology of pain sensitivity

The COMT gene is one of the most studied in pain research. It codes for catechol-O-methyltransferase, an enzyme that clears catecholamines such as dopamine and norepinephrine. The common Val158Met variant (rs4680) changes how quickly that enzyme works. Slower-clearing genotypes have been associated in multiple studies with heightened pain sensitivity and a greater tendency toward chronic musculoskeletal pain, including neck and shoulder complaints. This does not mean a given COMT result destines anyone to chronic pain — it describes a baseline tendency in how the pain system is calibrated.

Beyond COMT: sodium channels, inflammation, and connective tissue

COMT is one node in a larger network. The SCN9A gene encodes the Nav1.7 sodium channel, a gatekeeper for pain signals traveling from peripheral nerves toward the spinal cord; variants here influence how easily those signals fire. TRPV1, a receptor involved in heat and inflammatory pain, shapes how tissue irritation in an overworked shoulder translates into felt pain. Connective-tissue genes that govern collagen structure affect joint stability and how much strain the cervical spine and shoulder girdle absorb. Together these pathways explain why pain is rarely traceable to a single cause.

What the research shows about genetics and chronic musculoskeletal pain

Twin and family studies estimate that a meaningful share of the variation in chronic pain risk is heritable, with estimates commonly landing in the 25–50% range depending on the pain condition. Genome-wide research has linked variation near pain-processing and inflammatory genes to conditions ranging from neck pain to widespread musculoskeletal pain. The consistent theme is that no single gene "causes" shoulder and neck pain. Instead, small contributions across pain-signaling, inflammatory, and structural pathways add up to an individual baseline.

What pathway-level genetic insight adds

This is where genetic testing earns its place — not as a diagnosis, but as context. The Precision Peptide Genetic Test analyzes 14 pathways, 49 peptides, 150+ genetic insights, including pain-relevant signaling and inflammatory pathways. Seeing where your biology sits across those pathways turns a vague "why does my neck always hurt" into a set of specific, discussable factors. Genetics here is a guide, not a guarantee: it maps tendencies, and you and your provider decide what to do with the map.

Building a personalized pain-management conversation with your provider

A personalized plan still runs through a qualified clinician. Evidence-based approaches to shoulder and neck pain — targeted strengthening and mobility work, ergonomic changes, sleep and stress management, and, where appropriate, provider-directed medical care — apply to everyone. What genetic context adds is nuance: someone with a pain-sensitizing profile may benefit from earlier attention to sleep, stress, and pacing, while someone with connective-tissue variants may prioritize joint-stabilizing movement. The genetics inform the conversation; your provider makes the clinical calls.

Frequently Asked Questions

Can genetics really cause shoulder and neck pain?

Genetics rarely causes pain outright, but it shapes your baseline sensitivity. Variants in COMT, SCN9A, and inflammatory genes influence how strongly your nervous system amplifies pain signals. That inherited calibration, combined with posture, strain, and stress, helps explain why identical injuries feel very different from one person to the next.

What does the COMT gene have to do with pain?

COMT codes for an enzyme that clears stress-related neurotransmitters. Its common Val158Met variant changes enzyme speed, and slower-clearing genotypes have been linked in research to higher pain sensitivity and a greater tendency toward chronic musculoskeletal pain. It reflects a baseline tendency, not a fixed pain sentence.

Does the Precision Peptide Genetic Test diagnose or treat my neck pain?

No. The test does not diagnose, treat, cure, or prevent any condition. It analyzes how your genes influence pain-relevant and inflammatory pathways, giving you and your provider pathway-level context. Diagnosis and any treatment decisions always remain with a qualified healthcare professional who evaluates your full clinical picture.

How can I use genetic insight to manage pain?

Use it to inform a conversation, not to self-treat. A pain-sensitizing profile might prompt earlier focus on sleep, stress, and activity pacing, while connective-tissue variants might favor joint-stabilizing exercise. Bring your results to a qualified provider, who can fold them into an evidence-based, personalized plan.

Curious how your pain-signaling pathways are wired? Take the Precision Peptide Genetic Test to see how your DNA maps across 14 pathways, 49 peptides, 150+ genetic insights.

Disclaimer: The Precision Peptide Genetic Test analyzes how your genes influence peptide-related biological pathways. It does not recommend, prescribe, or determine which peptides you should use. Consult a qualified healthcare provider before beginning any peptide protocol.

This article is part of the PlexusDx Education Hub. Browse all Pain & Recovery education

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.