Neck tension refers to persistent tightness, stiffness, or discomfort involving the muscles and connective tissues surrounding the cervical spine and upper shoulder region. This condition commonly develops from prolonged postural strain, repetitive motion, emotional stress responses, inadequate recovery, low physical movement, dehydration, poor sleep quality, and chronic low-grade inflammatory signaling. Tightness may involve the trapezius, levator scapulae, sternocleidomastoid, and suboccipital muscles, often producing reduced flexibility, pressure sensations, fatigue, or discomfort radiating toward the shoulders and head. Elevated stress signaling through the hypothalamic-pituitary-adrenal axis may contribute to increased muscle guarding and altered neuromuscular activation patterns. Muscle contraction and relaxation require continuous electrolyte balance, mitochondrial energy production, oxygen delivery, and proper neuromuscular communication. Diets high in ultra-processed foods, sodium excess, refined sugars, and inflammatory compounds may contribute to oxidative stress, endothelial dysfunction, and altered muscular recovery. Reduced intake of magnesium-rich, potassium-rich, antioxidant-rich, and nitrate-containing whole plant foods may impair circulation and cellular relaxation processes involved in skeletal muscle recovery and vascular function. Plant-based dietary patterns rich in leafy greens, legumes, berries, cruciferous vegetables, seeds, herbs, and polyphenol-containing foods are associated with reduced inflammatory biomarkers and improved endothelial support. Foods naturally containing magnesium, potassium, vitamin C, vitamin K1, folate, nitrate compounds, and flavonoids may support vascular flexibility, connective tissue maintenance, antioxidant defense systems, and muscular recovery. Nitric oxide-supportive vegetables such as beetroot, spinach, arugula, and celery may assist healthy circulation to muscular tissue, while polyphenol-rich foods including berries and green tea provide antioxidant support linked to oxidative stress regulation. Neck tension is also associated with chronic stress-response activation involving cortisol, norepinephrine, and inflammatory signaling pathways such as NF-κB and prostaglandin metabolism. Long-term muscular tightness may alter sleep quality, physical performance, posture, and mobility. Fiber-rich plant foods additionally support gut microbiome activity and short-chain fatty acid production, which influence systemic inflammatory balance and immune signaling. A whole-food plant-based dietary pattern emphasizing hydration, mineral density, antioxidant diversity, and anti-inflammatory phytochemicals may help support normal muscle function, connective tissue resilience, circulation, and recovery processes associated with neck tension and muscular tightness.