With the development of wireless communication technology, more and more people are using cell phones, and the health problems associated with cell phones have attracted more attention. The radiation of cell phones in the end how harmful to the human body, how to minimize the degree of harm, has become the most concerned about the cell phone users. When people use cell phones, cell phones will transmit radio waves to the transmitting base station, and radio waves will be more or less absorbed by the human body, these waves are cell phone radiation. Generally speaking, the cell phone standby radiation is small, when talking radiation is larger, and in the cell phone number has been dialed and not yet connected, the radiation is the largest, the radiation is about three times the standby. These radiation may change the human tissue, causing adverse effects on human health. Hanging on the waist affects fertility: It is understood that the number of sperm of men who often carry and use cell phones can be reduced by up to 30%. Some medical experts point out that if the cell phone is often hung on the waist or abdomen of the human body, the electromagnetic waves generated when sending and receiving signals will be radiated to the sperm or eggs in the human body, which may affect the user’s fertility function. The British experimental report pointed out that rats are cell phone microwave radiation for 5 minutes, will produce dna lesions; human sperm, eggs for a long time by cell phone microwave radiation, may also produce dna lesions. Cell phone users try to keep the phone away from the waist, abdomen, do not hang the phone on the waist or in the coat pocket. Some men stuff their cell phones in their pants pockets, which poses the greatest threat to sperm because the pockets of their pants are right next to their testicles. When the user is in the office, at home or in the car, it is best to set the phone aside. When out and about, the phone can be placed in a purse so that it is further away from the body. Using headphones to answer the phone can also be effective in reducing the effects of cell phone radiation. Don’t put the phone on the pillow: According to Professor Zhao Yufeng of the Indoor Environment Monitoring Committee of the China Interior Decoration Association, cell phone radiation is harmful to people’s heads, it can cause dysfunction in the central nervous system, causing headaches, dizziness, insomnia, dreaming and hair loss, and some people have irritation in the face. Therefore, when people answer the phone, it is best to get the phone to a distance away from the body to connect, and then put it in the ear to talk. In addition, try not to chat with your cell phone, and also pay attention not to put the phone on the pillow when you sleep. Do not hang the phone on the chest: Many girls like to hang the phone on the chest, but research shows that the phone hanging on the chest, will have a certain impact on the heart and endocrine system. Even in the standby state with less radiation, the electromagnetic radiation around the phone can cause harm to the body. People with cardiac insufficiency and cardiac arrhythmia should be especially careful not to hang the phone on their chest. Some experts believe that electromagnetic radiation will also affect the endocrine function, leading to women’s menstrual disorders. In addition, electromagnetic radiation will also affect the normal cellular metabolism, causing disorders of potassium, calcium, sodium and other metal ions in the body. Cell phones are generally equipped with shielding equipment to reduce the damage of radiation to the human body, containing aluminum, lead and other heavy metals shielding equipment protection effect is better. However, women tend to choose small cell phones for aesthetic purposes, the protective function of such phones may not be perfect, therefore, in the absence of both small, protective function and strong cell phones before, female friends better not hang the phone on the chest.