Hello, Itching with a white milky discharge shows an underlying bacterial or fungal infection. Most likely you are suffering from bacterial vaginosis. This condition usually occurs due to new sex, sex without using condoms. Although exact cause is unknown. It is not an STD, although it can increase chance of getting STDs. It is also not fatal and can be easily treated with antibiotics. You should visit a doctor for a proper examination and few tests. It does not transfer to your male partner. You can decrease its incidence by having proper use of condom and by not having multiple partners. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zia Ul Haq, General & Family Physician