VSD does not need to be "treated" at all. This is not a disease, but a complex of psychosomatic symptoms. Behind this abbreviation, many hide their real problems, which are not very pleasant to think about (shyness, self-doubt, the need for love and support, etc.). "VSD" will pass by itself if you stop believing in it, and find excuses for yourself, and start working on your fears and worries.
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The described cases "passed by itself" - no. Perhaps not because there were no such cases, but because the ex-carriers of the VVD simply did not turn to specialists about this and "passed by itself" - was not recorded in the scientific world. Not in all cases, but in most of them, VSD is not quite an "independent" somatic illness (i.e. here the term "treat" may not be entirely fair), but a "covering" consequence of deeper phenomena from the field of competence of psychotherapy, psychiatry, psychoanalysis. You can, of course, hope for "it will pass by itself," but it is better to seek help, for example, from a psychotherapist or psychoanalyst, who will either prescribe medication support or only psychotherapy / analysis will be sufficient.