Women can regulate their levels of prostaglandins E1 and E2 through supplementation. Some dietary supplements can be taken to inhibit the production of E2 during PMS. For example, fish oil has been demonstrated to modulate the production of interferons and the proliferation of lymphocytes in a way that decreases prostaglandin E2 production. Flaxseed oil supplementation has a similar effect.
Both herpes simplex viruses (HSV) can cause sores. HSV type 1, which is normally transmitted through kissing or sharing objects like toothbrushes, normally causes sores on the mouth or tongue ( cold sores ). Sores from HSV type 2 are usually on the genital area, as this type of herpes is sexually transmitted. That said, it's possible no symptoms will occur with infection, or that sores may come and go.