A psychologist would not be my first point of entry. I'd seek out a speech pathologist. Psychologists, typically, have limited knowledge of stuttering and the emotional impact of stuttering. I'm certain a psychologist could be helpful, but I get the sense (from my own clinical background, conversations with my own psychologist [saw her for issues unrelated to stuttering] and my experiences with stuttering) that a speech pathologist is a better first professional to see. In the US, most speech pathologists have informal training in counseling. I don't know training requirements for countries outside of the US and Canada. However, disorders of communication often generate many deeply personal reactions and [good] speech pathologists are often very capable to manage these. However, as a caveat, because your cousin is 17 I think he needs to be involved in any decision to pursue treatment. He is old enough to weigh the pros and cons. As often is the case in stuttering treatment, people cannot make progress in therapy until they are ready for change. Change is very difficult -- the effort involved is not to be underestimated; but it's not impossible. In any case, he has to be willing to invest in treatment, or else no progress will be gained and it will likely only cause discord and distress in your relationship with him. I'm unfamiliar with resources available in most of Europe. However, the Michael Palin Centre in London (http://www.stammeringcentre.org/mpc-home) might know of more resources for you. The only stuttering information in other parts of Europe that I'm familiar with is research facilities. I'm not sure if they have clinical support. I'm not sure what regions constitute northern Europe, but the university I'm most familiar with is Göttingen University in Germany. They might be another good place to start. In the US most large universities have a speech pathology program (not all, but many). I suspect the same is true in Europe. Universities are a great place to begin looking. Many have clinics where student clinicians develop clinical skills. Therapy received at these clinics is usually available at a discounted rate (cost might not be an issue depending on your cousin's country's healthcare system).