When someone is foaming at the mouth and convulsing, what a bystander can do is to move the objects around the patient that will lead to the patient’s injury to prevent the patient from being injured; let the patient lie on his or her side and wipe away the vomit with tissues to prevent the patient from inhaling the vomit into the respiratory tract and causing asphyxiation; at the same time, you can help the patient call 120 emergency number and wait for the medical professionals to deal with it. Most of the whole body convulsions last less than 2 minutes, pinching is not effective, pinching will not stop the convulsions, pinching with too much force will also lead to additional injuries; when the patient is convulsing, it is not recommended to stuff anything soft or hard into the mouth, because the force of the bite muscle is very strong when convulsing, it can bite off what is stuffed into the mouth, which can also cause asphyxiation. In addition, do not strongly press the limbs when the convulsions, strong pressure on the limbs will not stop the convulsions, but may also lead to fractures; the patient will have a period of insensibility after the convulsions stop, do not feed the patient random water and medicine at this time, so as not to cause choking, accidental aspiration, patiently waiting for the arrival of 120 emergency personnel.