This is a disease called "stuttering". There are many reasons for stuttering, such as stress, anxiety, anger, panic, grievance, grief, disappointment, and excitement, which can all cause stuttering. Some people tend to stutter when they are nervous, angry, or wronged. This is normal. Some people tend to stutter when they are happy or excited, which is normal. These are normal physiological reactions and do not require special treatment. If the stuttering is caused by some psychological problems, treatment is needed. If it is caused by tension, you must learn to relax yourself and not be too nervous. If stuttering is caused by some physiological reactions, you must learn to relax yourself. If it is due to psychological factors, you must learn to relax yourself. If stuttering is caused by physiological reasons, you must learn to relax yourself.