I have been a stammering issue since  i was 10 year old.In starting there was not any major issue and I took it lightly but when I entered in college then I realised that it will be more. In normal situation I am not stammer but it occurs when I am in stress situation,in interview,in group discussion,in fear and angry situation. I speak little bit fast to hide this problem with others .I read the cure of stammering from internet but not very beneficial to me.i haven't​ go to hospital for this problem.my background is also free from stammering issue and I haven't had a major disease.plz suggest me which type of exercise should I do for overcome this and either i should go to consult a doctor or not