Does flattening dds beauty and health massager have negative effects?
There is no negative impact. At present, biological electromagnetic waves are all in the name of health care instrument and massage instrument. There are only two kinds of high-frequency physical therapeutic instruments, and the massage instrument you mentioned must be medium and low frequency and can be used for a long time. Do not use the advice of pregnant women, cancer and serious heart disease, heart, eyes and head. Direct use of electrodes is not allowed.