When Neck Pain and Headaches Are a Screen Height Problem 📱 Looking down multiplies neck load In a neutral position, the human head weighs about 10–12 lb. As the neck bends forward to look at a phone or laptop, the effective load on the cervical spine rises sharply. At roughly 45–60 degrees of neck flexion, the neck may experience forces equivalent to 40–60 lb, a three- to five-fold increase compared with neutral posture . 🧠 Why this causes headaches Sustained forward head posture increases str