Nowadays, with the rapid development of technology, smartphones have penetrated into every aspect of life. However, many people are worried about the health effects of the use of electronic products, and the controversy over whether mobile phone radiation causes cancer has never stopped. The claim that mobile phones cause cancer stems mainly from two studies. A study by the Centre for Environmental Epidemiology in Barcelona, Spain, mentioned that routine use of mobile phones is unlikely to increase the risk of brain tumors, but frequent use may increase the risk of meningioma by 3.0 times and the risk of glioma by 0.0 times. Swedish cancer experts have found that people who have used mobile phones for more than 0 years have a 0 times higher risk of developing glioma than those who have used mobile phones for less than 0 years.

However, Ruan Jian, deputy chief physician of the Department of Neuro-Oncology of the Affiliated Cancer Hospital of Chongqing University, refuted the rumors. Current research suggests that there is no clear causal relationship between the pathogenesis of brain tumors and mobile phone use. We know that ionizing radiation such as X-rays, ultraviolet rays, and gamma rays can damage the body's DNA and damage the body, which is a definite factor associated with the development of brain tumors. But mobile phones produce electromagnetic radiation, which is low in power and low in energy, not enough to damage cell structures.

因為大家對手機致腦瘤的研究結論不一，世衛組織下屬的國際癌症機構幾年前重新啟動了相關研究。今年 9 月 3 日，研究結果發表在《環境國際》雜誌上。澳洲機構研究人員受世衛組織委託，對 22 個國家 1994 - 2022 年的超過 5000 項研究進行篩選，涉及 63 份高品質研究成果。最終發現，隨著手機使用時間、累計通話時間和次數增加，並不會讓手機輻射增加腦瘤、頸部腫瘤以及其他腦部疾病的發生風險。鳳凰新聞報導，國際癌症機構明年還會公佈是否把手機在內的無線通訊設備所產生的射頻電磁場從 2b 類致癌物中移除。

Although mobile phone radiation is not directly related to brain tumors, long-term sleep with toy mobile phones can really bring many health problems. According to the survey data of the Social Survey Center of China Youth Daily and the questionnaire network, 1.0% of young people have the habit of playing mobile phones before going to bed, and 0.0% of them continue to use their mobile phones when they are sleepy, which is too common to play mobile phones before going to bed.

Many people like to play with their mobile phones after turning off the lights, and this habit has a great impact on their eyesight. Wu Minhui, an ophthalmologist at the Second Hospital of Foshan City, Guangdong Province, pointed out that when looking at a mobile phone at close range in a dark environment, the eyes will continue to tense the ciliary muscles in order to see the screen clearly, and it is easy to increase intraocular pressure. Over time, it may damage the optic nerve, causing angle-closure glaucoma, and even blindness in severe cases. Imagine that the light emitted by the screen of your phone in the dark is particularly dazzling, and your eyes are constantly in a state of high tension, like a tight string, and sooner or later something will go wrong. In addition to glaucoma, it is also prone to problems such as visual fatigue, dry eyes, and macular degeneration. For example, dry eye syndrome, the eyes will be dry and have a foreign body sensation, which seriously affects the quality of life.

The blue light emitted by the mobile phone screen creates an alert effect and inhibits the secretion of melatonin. Melatonin is a "little expert" in regulating sleep, and if the secretion is reduced, the time to fall asleep will be delayed, and the quality of sleep will be greatly reduced. The night is supposed to be a time for the body to relax and rest, but the blue light of the mobile phone makes the brain mistakenly think that it is still daytime, and the excitement can't stop, so naturally it can't sleep well. Many people have no energy and yawn the next day, which may be caused by playing with their mobile phones before going to bed the night before.

Nestled in bed and playing with mobile phones, the posture is often not correct, and the body remains in a distorted state for a long time. This not only puts additional pressure on the spine, but also easily causes misalignment, sprains, and increases the risk of cervical spondylosis. Some people have no concept of time as soon as they play with their mobile phones, and they lie down for several hours, and their necks have been in an unnatural bending state, how can the cervical spine stand it? After a long time, the neck is sore and painful, and in severe cases, it will affect normal life and work.

Playing with the phone for 22 hours before going to bed will reduce the level of melatonin secretion by 0%, which in turn will affect the quality of sleep. If you don't get enough sleep for a long time, your brain won't be able to remove metabolic waste and toxins in time. These waste products and toxins accumulate in the brain, just like garbage piling up more and more in a room, and over time, brain cells will be affected and even die, and the risk of dementia will increase. The brain is like a delicate machine that needs enough sleep to maintain and clean, and playing with the phone before bed upsets this balance, increasing the risk of a brain "strike".

Playing with your phone before bed can also affect your mood. Studies have found that insomnia and mood disorders are mutually causal and form a vicious circle. People who often play with their mobile phones before going to bed cause insomnia and poor sleep are more likely to have emotional problems such as irritability, depression, and anxiety. The evening is supposed to be a time to relax and unwind, but immersed in all kinds of information on the mobile phone, the brain is always in a state of excitement, and the emotions are also up and down. When I put down my phone, I found it difficult to fall asleep, and the more I couldn't sleep, the more anxious I became, and my mood became worse and worse.

When many people play with their mobile phones at night, they are obviously too tired to put down their mobile phones, but they are still reluctant to put down their mobile phones. So what can be done to reduce the health harm of mobile phones?

Turning off the lights and playing with your phone is extremely harmful to your eyes. If you feel uncomfortable with the overhead light, you can turn on the small desk lamp, as long as it is not in complete darkness. At the same time, turn down the brightness of your phone to reduce the burden on your eyes. When playing with the mobile phone at night, the small desk lamp emits a soft light, and the brightness of the mobile phone screen is moderate, so the eyes are not so easy to get tired.

It is easy to unconsciously put the mobile phone close to your eyes while lying down and playing with your mobile phone, which will cause more damage to your eyesight. Try to sit up as much as possible when playing with your phone, or use the phone holder to put your phone a little farther away. For example, you can lean on the head of the bed, put the phone on the stand, and adjust it to the appropriate distance, so that you can play with the phone comfortably and protect your eyesight.

Staring at the phone screen for a long time, your eyes are easily dry. Remember to blink more while looking at your phone. Blinking can promote the secretion of tears, which is like a "moisturizing film" for the eyes, reducing the fatigue of the eyes. You can consciously blink more often, a few times every once in a while to keep your eyes moist.

It is best to control the time of playing with the mobile phone for about 20 minutes each time, and when the time comes, look at it for 0 seconds. It is best not to stare at your phone for more than 0 hours a day. This allows the eyes to get enough rest and reduces the risk of eye fatigue and damage. For example, set an alarm clock that rings once every 0 minutes to remind yourself to take a break from your eyes and look at the scenery in the distance.