Smartphones have become an everyday necessity for millions of people, but spending hours looking at a small screen can affect more than how much time you spend online.
Frequent smartphone use can encourage prolonged periods of hunching, bending and holding the head in a downward position. Over time, those habits may contribute to discomfort in several parts of the body, including the neck, shoulders, back, hands and eyes.
Doctors and health professionals have used the informal term “phone body” to describe some of the physical effects associated with repeated smartphone postures. The concern is less about the device itself and more about how people position their bodies while using it.
A 2025 report from Harmony Healthcare IT found that Americans spend an average of more than five hours a day using their phones. With that much time spent looking at a handheld screen, even small posture habits can become repetitive.
Here are seven ways frequent smartphone use may affect your body and what you can do to reduce the strain.
1. Neck discomfort can develop
One of the most commonly discussed effects of prolonged phone use is neck strain.
People often hold their phones below eye level and tilt their heads downward to read messages, watch videos or browse social media. Staying in that position for extended periods can place additional stress on the neck and upper back.
The informal term text neck is often used to describe discomfort associated with prolonged downward looking posture. Repeatedly maintaining the position may contribute to stiffness and soreness, particularly when phone use continues for long periods.
Raising the phone closer to eye level can reduce how far the head needs to tilt forward.
2. Your shoulders can feel the strain
Phone related posture problems do not necessarily stop at the neck.
When someone bends forward while using a smartphone, the shoulders can also move into a rounded position. Holding the same posture for an extended period may leave the muscles around the neck and shoulders feeling tight or uncomfortable.
Changing positions regularly and taking breaks from the screen can give those muscles an opportunity to relax.
3. Your back may be affected
Smartphone use can also encourage poor sitting and standing habits.
Unlike a computer monitor, a phone can be used virtually anywhere. People may scroll while sitting on a couch, leaning over a table, lying in bed or walking around.
Those positions can make it easier to lose awareness of posture. Spending less time in one position and sitting or standing upright when possible can help limit the physical strain associated with extended phone sessions.
4. Your thumbs and hands get repetitive use
Smartphone activities often involve repeated tapping, swiping and typing.
When those movements are performed frequently, the hands and thumbs can become uncomfortable, particularly if someone spends hours messaging, gaming or browsing.
Using both hands when practical, switching tasks and taking regular breaks can reduce repetitive movements. Persistent pain should not simply be ignored, particularly if it interferes with normal activities.
5. Your eyes may become uncomfortable
Looking at a screen for long periods can also leave the eyes feeling tired or strained.
However, the relationship between smartphone use and vision problems is more complicated than simply blaming screens. Research has also examined the role of time spent outdoors, particularly in relation to nearsightedness.
A 2015 study published in JAMA Ophthalmology found an association between outdoor exposure and myopia-related concerns. Spending more time outdoors may therefore be an important part of protecting children’s eye health, rather than focusing solely on reducing screen exposure.
6. Your elbows can be affected by prolonged positioning
The way a person holds a phone can also place stress on the arms and elbows.
Holding a device in the same position for a long time, particularly while lying down or sitting awkwardly, can contribute to discomfort. Changing how the phone is held and moving the arms periodically may help prevent stiffness.
The goal is to avoid keeping any single joint in a strained position for too long.
7. Your posture can become a habit
Perhaps the biggest concern is not one particular body part but the repeated posture itself.
If someone spends several hours every day looking downward at a phone, that position can become automatic. Over time, a person may find themselves hunching even when they are not using the device.
The good news is that smartphone habits can be changed.
Holding the phone closer to eye level, taking frequent breaks and incorporating simple posture exercises can help. A chin tuck, for example, is a commonly recommended exercise for improving awareness of head and neck positioning.
Massage or gentle stretching may also provide temporary relief from muscle tension.
Small changes can make phone use easier on your body
Smartphones are unlikely to disappear from daily life, so completely avoiding them may not be realistic. Instead, paying attention to how you use your device can make a meaningful difference.
Try raising your phone instead of repeatedly bending your neck toward it. Change positions throughout the day, give your eyes regular breaks and avoid spending hours in the same posture.
Most importantly, listen to your body. Persistent or severe pain should be discussed with a health care professional rather than attributed automatically to smartphone use.
A few simple changes to the way you hold and use your phone may help reduce unnecessary strain while allowing you to stay connected.
