You first have to find out where that reaction comes from. That requires counseling. ie. Did you suffer some trauma or abuse as a child. Such abuse triggers a fight or flight response as a means of self preservation and defense. Some children find safety by shutting themselves away in their room until their alcoholic father yells himself to sleep. Others learn that if they scream and yell back, the abusive parent will finally shut up. Either way, this learned behavior will illicit a similar response in us as adults. They never learned learned proper conflict resolution skills. For instance, a person may find it hard to deal with authority figures such as a boss at work who is domineering and argumentative. They may have difficulty keeping a job for very long because they cannot handle even the smallest reprimand or criticism. This evokes in them the same feelings they had when they were a child. There are ways to overcome this with the help of a qualified professional.