Neck pain when looking down: phones and screens, the muscles and joints, nerve pain and what helps

Why looking down can hurtStrong evidence

The Chartered Society of Physiotherapy (CSP) says the exact cause of neck pain usually can't be found, serious damage is rare, and the most likely source is "a strain of one of the small joints located on the side of the neck", the facet joints, with the discs less often and the nerves less often still. NHS inform says neck problems "are rarely caused by any serious disease or damage".

The NHS lists "bad posture - for example, when sitting at a desk for a long time" among the common causes, while the CSP says posture "plays a much smaller role in neck problems than previously thought" and points to long, still positions, poor sleep, muscle tension, low activity and stress. Both agree on the practical point: don't hold your neck in one position for long.

Sources 1, 2, 3

What looking down does to the neckStrong evidence

Using a phone bends the head 33 to 45 degrees, more when texting and more sitting than standing. The load on the neck and the work of the muscles at the back of it rise with the angle, and in a modelling study the demand on the neck muscles during tablet use was 3 to 5 times that of a level head, least with the tablet propped high. In the lab, holding the neck bent brought on discomfort within minutes and signs of muscle fatigue within an hour. Healthy necks are built to carry this; these are short lab studies in young adults, and they measure load and discomfort, not injury.

Sources 4, 5, 6, 7, 8

Does looking down at screens cause neck pain? The cohort and the surveysMixed evidence

The posture: in 396 adults without neck pain followed for a year in Brazil, how far they bent the neck to text, measured with a device, didn't predict neck pain (odds ratio 1.0 per degree); poor sleep (1.76) and too little physical activity (2.41) did. Only 40 people developed neck pain, so the study is small. Texting posture wasn't linked to neck pain in 582 adults, 150 young adults or 192 students measured once, and two reviews found no agreed definition of "text neck" and no study showing it causes neck pain.

The amount: surveys that pool many one-off studies find heavier phone and screen use goes with more neck pain (odds ratios about 1.8 to 2.3 for phone use in adults, 1.36 in children and teenagers), with signs that studies finding no link went unpublished. In 1,691 Singapore teenagers followed for a year, phone use predicted neck and shoulder symptoms (odds ratio 1.61), but the hours of use didn't; in 7,092 young Swedish adults, texting went with neck pain lasting, not with new neck pain. Office workers followed over time didn't show posture as a risk factor; low job satisfaction, a keyboard close to the body, little variety in tasks and feeling muscle tension did. So the fair summary is mixed: long, unbroken spells, poor sleep and little activity seem to matter more than the angle.

Sources 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21

The "27 kg head" figureEmerging evidence

The widely shared claim that your head "weighs 27 kg (60 lb)" when you look down is credited to a 2014 paper whose published summary gives no figures or methods, and its full text couldn't be checked. Studies that measured posture and muscle activity estimate compression in the neck at about 1.6 to 2 times that of a level head at 45 degrees (8 men, a model driven by muscle readings), and muscle demand 3 to 5 times with a tablet. The head's weight doesn't change: the muscles at the back of the neck work harder to hold it.

Sources 23, 22, 6

How the causes are told apartEmerging evidence

Tests can't reliably tell which structure hurts in ordinary neck pain: a multisociety guideline says "there are no single pathognomonic historical symptoms or physical examination signs" that identify facet joint pain, and disc pain's share "appears to be low". No study opened ties looking down to one structure, so this guide says "often the muscles and small joints" rather than naming one. It doesn't change the first treatment.

A trapped nerve (cervical radiculopathy) gives sharp arm pain, pins and needles or numbness in one arm. It's usually brought on by tipping the head back and towards the sore side, and sometimes eased by resting the hand on the head; no single test is decisive. In a US population study it affected 83 people per 100,000 a year, peaking at 50 to 54, and 90% were symptom-free or only mildly affected at follow-up; a review found most improvement comes within 4 to 6 months.

Sources 24, 25, 26, 27, 28

The spinal cord: rare, but worth knowingEmerging evidence

Pressure on the spinal cord in the neck (degenerative cervical myelopathy) causes "loss of dexterity (difficulty doing up buttons, using keys, mobile phones, or writing)" or trouble walking and falls, mostly from the 50s, and people often put it down to getting older. One review put it at about 2.3% of adults, and on average people had symptoms for over a year before diagnosis. A guideline recommends surgery for moderate and severe cases.

An electric shock that runs down the spine, sometimes into the arms or legs, when you bend your head forward is called Lhermitte's sign. The MS Trust says it "usually only lasts a few seconds", "is not life-threatening", and that anyone without a diagnosis of multiple sclerosis (MS) should get it checked. It was reported by 16% to 41% of people with MS in two clinic studies, by about 45% of 47 people harmed by heavy nitrous oxide use (which causes a lack of vitamin B12), and in severe spinal cord pressure. The NHS MS and vitamin B12 pages don't mention it, so the same-day tier in the warning signs is our suggestion.

Sources 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40

When a scan or test helpsStrong evidence

Not for ordinary neck pain. In 1,211 people with no neck symptoms, MRI showed bulging discs in 87.6%, including about three quarters of people in their 20s, and spinal cord compression without symptoms showed in 24.2% of people across another set of studies. A US radiology panel rates MRI "Usually Not Appropriate" for new neck pain without arm symptoms or warning signs, and the CSP says scan findings aren't strongly linked to pain.

Scans matter for suspected spinal cord pressure that is getting worse (an urgent MRI), a trapped nerve that has lasted, and a significant injury, where clinicians follow the Canadian C-spine rule that NICE uses. With an unexplained electric-shock feeling, numbness or unsteadiness, a blood test for vitamin B12 can be part of the checks.

Sources 42, 30, 43, 1, 29, 44, 39

How it usually goesStrong evidence

"Most neck pain only lasts a few weeks", the NHS says. NHS inform expects the biggest change "within the first couple of weeks" and most problems to improve within 8 weeks, and the CSP says most neck pain problems get "a lot better within three months". A wry neck usually settles within a few days. Neck pain often comes back: in population studies, half to three quarters of people report it again 1 to 5 years later, and younger people tend to do better. No one can promise a date.

Sources 3, 2, 49, 47, 1, 48, 46

Move often and take short, frequent breaksStrong evidence

NHS inform advises "moving your neck for short periods every hour" and avoiding "staying in one position for too long without moving"; the NHS says "do not keep your neck in the same position for a long time". The Health and Safety Executive (HSE) says short breaks often beat longer ones less often: "5 to 10 minutes every hour is better than 20 minutes every 2 hours". In a lab study, five short breaks in an hour of looking down prevented the muscle fatigue that one or two longer breaks allowed. A Cochrane review found extra breaks reduced neck discomfort only a little, on very low-quality evidence.

Sources 2, 3, 50, 8, 57

Screens and devices: raise them, though set-up alone isn't a cureEmerging evidence

The HSE suggests the "Top of screen level with eyes, about an arm's length away", the screen directly in front of you, and for a laptop a separate keyboard and mouse "so screen can be elevated on a laptop riser or similar". It counts tablets and smartphones as display screen equipment but gives no advice specific to them, so holding a phone higher and propping a tablet up is our suggestion, from lab studies that found less neck bending and lower neck muscle load when devices sit higher. In trials, workstation adjustment and sit-stand desks on their own didn't prevent neck or shoulder problems.

Sources 51, 52, 53, 54, 6, 55, 56, 57

Strength for neck pain that lastsStrong evidence

A Cochrane review of 27 trials found moderate-quality evidence that strengthening the neck, shoulders and upper back eases chronic neck pain by a moderate to large amount in the short term, while stretching alone may not help; for new neck pain there were no trials to judge. Across 38 trials, motor control, yoga or Pilates and strengthening all beat no treatment, with no clear winner. The CSP says it doesn't seem to matter much which exercise you do, as long as you stay active.

In 198 workers with frequent neck and shoulder pain, as little as 2 minutes a day of elastic band exercise, 5 days a week, eased pain by 1.4 points out of 10 more than health advice at 10 weeks. Reviews of office workers support strengthening on low-certainty evidence.

Sources 58, 59, 47, 60, 61

Chin tucks and posture exercises: control improves more than painEmerging evidence

Deep neck flexor training (the lying chin tuck) improves the control of the deep neck muscles and the ability to hold an upright neck during computer work. Exercise for forward head posture moved the head back about 3.4 degrees and eased pain by about 1.4 points out of 10 across 10 trials, on low to moderate certainty, and the posture change hasn't been shown to be why the pain eased.

Sources 62, 63, 64

Pillows, heat, painkillers and collarsMixed evidence

The NHS suggests "a low, firm pillow", your head "the same height as the rest of your body", and not sleeping on your front. No pillow type is clearly better in reviews, though latex pillows eased waking pain slightly in one pooled analysis. The NHS suggests paracetamol or ibuprofen, or ibuprofen gel, and heat or cold, and says "do not wear a neck collar - it's better to keep your neck moving". A short spell in a collar is an option only for a recent trapped nerve, where it helped about as much as physiotherapy over the first 6 weeks.

Sources 3, 65, 66, 2, 67

Screens, phones, reading and sleep (written steps)

Our 3D figure can't show these. They come from NHS inform, the NHS and the HSE; where a step is our suggestion, it says so. No trial has tested a way of using a phone for neck pain.

• 1. Move your neck for short periods every hour, don't stay in one position for too long, and carry on with your normal activities and work if you can (NHS inform).
• 2. Take short, frequent breaks: 5 to 10 minutes every hour beats 20 minutes every 2 hours, getting up and moving or at least stretching and changing position (the HSE). While it's sore, also look up from the screen for a few seconds every 10 to 15 minutes (our suggestion, from a lab study of short breaks).
• 3. At a desk: the top of the screen about level with your eyes, about an arm's length away, directly in front of you; a laptop on a riser with a separate keyboard and mouse; a document holder for paper (the HSE).
• 4. Phones and tablets: hold the phone up nearer eye level with your elbows resting, prop a tablet on a table or a stand rather than your lap, and use a case that tilts it; voice notes or a call can replace long texts (our suggestion, from lab studies).
• 5. Reading, knitting, crafts and homework: raise the work on a cushion, a book stand or a slope, sit with your back supported, and take the same breaks (our suggestion).
• 6. In bed: one low, firm pillow with your head level with your body, no sleeping on your front and no twisting your neck (the NHS); avoid long spells on a phone propped on pillows in bed (our suggestion).
• 7. Heat or cold for comfort: a pack of frozen peas wrapped in a tea towel for 5 minutes, 3 times a day, or a hot water bottle wrapped in a tea towel for 20 minutes, 2 to 3 times a day; paracetamol or ibuprofen, or ibuprofen gel; no collar (the NHS).
• 8. At work: you don't need to be pain-free to work (NHS inform); ask your employer about adjustments and a workstation assessment if you use a screen daily for an hour or more at a time (the HSE).

Sources 2, 50, 51, 52, 53, 3, 8, 54, 6

Looking down comes back (written steps)

No study has tested how to build screen time back after neck pain. These steps are our suggestion.

• 1. Note how long you can look down before the ache starts to build, and take your break just before that point.
• 2. When your neck has been no worse the next morning for 3 or 4 days, add 10 to 15 minutes before the break.
• 3. Long films, flights, exams or a long day at a laptop: raise the screen, plan the breaks, and do a few nods and chin tucks at each one.
• 4. If it flares, go back to shorter spells and the stage 1 moves for a few days, then build again.