If it is not an angry scream I would blow in the child’s face, just like you do in the pool to get them to hold their breath. This will catch them off guard and stop the screaming, a moment, so they can hear you. You might have to do it a few times. I would say, “Do not scream, tell me or show me what you want.” I would then teach them to take deep breaths to calm them self down. Saying “Take a deep breath, in through the nose out through your mouth.” Then demonstrate to them how to do it.
If I am at home and it is an angry scream that won’t stop, I use the corner as much as possible for this age. I do spank sometimes, just rarely. The key to the corner is doing it right. I tell the child they are going to have to sit in the corner because they are throwing a fit, won’t obey, ect…I place the child in the corner and tell them they have to stay there until they are ready to be nice, listen, stop screaming, ect…Now for this age the corner should be an area that is really dull. The end of a hall with all the doors closed works great. When I first started instituting the corner they tried to escape from it many times. I simply pick them up and put them back, NEVER holding them down in the corner. They get right back up over and over again. Now I have some work to do. I DO NOT
SPEAK, and DO NOT GIVE EYE CONTACT! I just pick up and put back until they stay put. I leave them there until they have calmed down. Then I go talk to them and ask them why they are in the corner. They need to say sorry to mommy. Then comes hugs,kisses, and we move on.
My 4 yr. old will go to the corner when I tell him to; even if he is throwing a tantrum along the way. He will stay there until I tell him he can get out. He is rarely sent to the corner anymore though. The threat of it is usually enough. People are always amazed at how well he listens. With my older dc I now use more natural consequences, than the corner. However, it works great for young ones.
At a friends house I do the same thing.
At the store I used to leave my cart and take him to the van, buckle him in the car seat, close the door, and walk to the back of the van (where I can see him but he can’t see me). When I think he has calmed down I go ask him if he is ready to be nice. If I get a bad response, I close the door, and wait some more. A good response with an apology gets hugs, kisses, ect…