Once most of the time people will stoop to stoop to play often face down, making the neck shoulder symptoms occurring kreng. The blood circulation. If you play too long, there may be a headache.
Most of the time, because people tend to play phone face down, bow neck and shoulder symptoms of spasticity. If blood flow is not easy to play for a long time may have a headache coming on.
Because most people time to play phone often look down, bend down to the neck and shoulder symptoms of rigidity, blood circulation is inconvenient, if long play. May have a headache following .