I believe this is just one factor involved, not a root cause or or cure all. Also it's possibly only for lowering symptoms.
(Note: if you think herb's are bs, just remember that aspirin was discovered from Willow plants
https://en.wikipedia.org/wiki/History_of_aspirin )
In a lot of test results posted here on the forum, high prolactine is mentioned.
Prolactine is inversely corelated(?) to dopamine (TBD: insert study)
Prolactine is raised after orgasm.
https://www.ncbi.nlm.nih.gov/pubmed/16095799 (
higher after masturbation, possibly a reason the nofap crowd detests masturbation vs sex EDIT: Thanks for pointing out)
The herb Vitex agnus-castus
https://en.wikipedia.org/wiki/Vitex_agnus-castus ("also called vitex, chaste tree (or chastetree), chasteberry, Abraham's balm, lilac chastetree, or monk's pepper") can (in higher doses) inhibit Prolactine. In lower doses it actually makes Prolactine more pronounced.
The English Wikipedia page is unfortunately not as detailed as the German one on this.
In Germany, this herb is actually used to treat PMS and to increase chances of pregnancy. One reason is that it is supposed to also increase Progesteron. I see in the forum here that Progesteron is used as POIS cure.
https://www.researchgate.net/publication/329001362_Improved_progesterone_levels_and_pregnancy_following_vitex_agnus-castus_Chaste_tree_supplementation_in_a_case_of_recurrent_pregnancy_loss_A_case_reportAddendum: There is other herbs popular in Germany for female health and progesteorne: Alchemilla (Lady's mantle)
https://en.wikipedia.org/wiki/Alchemilla has ingredients similar to Progesterone as far as I understand it.