dysmenorrhea could be caused by adenomyosis
Its been shown that reishi reduces NF-kappaB. And the study below thinks that NF-KappaB is causing adenomyosis!
Constitutive and tumor necrosis factor-α-induced activation of nuclear factor-κB in adenomyosis and its inhibition by andrographolide
http://www.fertstert.org/article/S0015-0282(13)00542-6/abstract
Here they talk about reishi as well - reducing pelvic inflammation...
Treatment for Uterine Fibroids: Searching for Effective Drug Therapies