Stuttering is a vicious cycle there is nothing there to stop you from speaking ,you are a fluent speaker when you speak alone ,sing ,whisper ,saying in light \ easy onsets and speaking in slow prolong way you don't stutter. Stuttering is the results / outcomes (secondary ) and the real process (primary) is our thought and perception surrounding our speech and ourself and also its became an habit pattern to think and speak in this way ( bcoz you behave like this daily and also think and percept the things daily ) ,and process (valsalva or fear response) associate with it is something that is out of our control . We have learn certain things evolutionary which is learn by our brain in thousands of years ie. All emotions and inbuilt response . > Emotions , that is Love, Anger , Hate , Anxiety , Fear its deep rooted in ourself . > Inbuilt response , like when some body try to control you or offend you, Anger is an response that is inbuilt to protect your interest . Sameway Fear response when you fear about a particular things you brain gets on high alert mode and when you get into that situation your brain enter in ( fight - flight - freeze ) response and your body gets tightened and breathing rate increases and body performs valsalva mechanism , which is not in our control ,so no need of knowing it but it can help us to better understand the process ,check out https://stutteringtherapist.com/understanding-controlling-stuttering-book/ And there is a slight anomaly with our brains ,( for eg , Stress , stress is response in order to make aware or alert about a particular thing or to avoid it , but it create a negative impact in your body like a self destruction switch ). Let me clear our brain cannot distinguish between life threatening situation and simple easy daily life non - threatening situation I.e ( public sneaking , bcoz we are social being and its important for us to make an good impression on society that's where fear and anxiety arise ,bcoz its is important ). You become socially anxious and then when you get chance to speak your brain will initialize the fear and stress response , and even people who are fluent tends to stutter or get freeze during a stressful situation , not just speech your whole body get tight as if ready to fight or flight ( run ) or freeze . Stuttering is a result of your negative thoughts and beliefs that make you socially anxious and also its will become a habit if this vicious cycle goes for a long time . If you do think negatively everytime ( habit and how you behave daily in everyday life ) then in heat of moment or when spotlight is on you , you will be avoiding or will runaway from that situation just like a life threatening situation , In particular time when you need to speak something important your brain does the thing which you do daily (that habit or thought get reinforce in your brain ) that is to get anxious or to get uncontrollably faster , etc. Many solution are based on theories that are use to tackle fear , anxiety and depressions like letting go , stoicism , awareness and mindfulness and also on techniques like diaphragm breathing , positive hypnosis , tricks and techniques . I would recommend you to follow leeglovett and williamdparry and the people who have cure / made a achievement in life despite stuttering ie joe biden. And another point is to desensitize yourself from fear by going in that situation with 'Intention of just saying the purpose or content confidently and in Calm way And Not an intention of being fluent , good impression , reaction of listener, + attitude , and change in attitude. and just ignore negative thoughts That's it . Fluency doesn't require force or anything it comes by its own , it has its own flow but when you try to become fluent your brain try to help you by adding extra force as if to force out word but , this is response of brain in pressure , fear or of doing task that is important (like proposing to your love partner or talking to your boss ) . This response is helpfull when you do a physical task like running , fighting or some physical task But it acts totally oppositely in situation when you need to focus , when you need precision ( singing ) , delicate task like making paintings . So , that's why singer practise like a singer and when they go on to the stage they behave and think like they are not singers that help to reduce pressure .