Stuttering usually starts between the 2nd and 6th year of life. At this age it happens to many toddlers that they speak less fluently for a period of time. Around 4% of all toddlers repeat words or stumble over what they want to say. This is not surprising as talking is a complicated process that requires a lot of practice. At this age the vocabulary increases enormously, but the knowledge about sentence structure and speech motor skills are not sufficiently developed yet.
A lot of stuttering people have a low self-image. This can be caused by bullying and years of therapies with no (significant) results. They have lost faith in themselves throughout the years and sometimes think of themselves as being a loser while carrying that image.
Stuttering, also known as stammering, is a speech disorder in which the flow of speech is disrupted by involuntary repetitions and prolongations of sounds, syllables, words or phrases as well as involuntary silent pauses or blocks in which the person who stutters is unable to produce sounds.