Bacterial Vaginosis

Bacterial vaginosis (BV) is a common imbalance of the bacteria normally found in the vagina. It typically causes a thin, grey or white discharge with an unpleasant, fishy smell, which may be more noticeable after sex or during a period. Unlike thrush, it does not usually cause itching or soreness. The treatments here are gels and pessaries without antibiotics that help restore the vagina's natural acidity: Balance Activ BV Gel (also in a 14-pack) and Balance Activ BV Pessaries, Relactagel, Multi-Gyn ActiGel and Replens MD BV. The Suresign Vaginal pH Test can show whether your vaginal pH is raised, which is common with BV. Itching, soreness and a thick white discharge are more likely to be thrush. See our thrush treatments.

Is it BV or thrush?

BV: thin, grey or white watery discharge with a fishy smell. Usually no itching or soreness.
Thrush: thick, white discharge with little smell, plus itching, soreness or redness around the vagina.

If you are not sure which you have, a vaginal pH test can help. A raised pH is common with BV and less so with thrush. You can also ask our pharmacist.

Frequently asked questions

What causes BV?

BV happens when the protective lactobacilli in the vagina fall and other bacteria increase. It is not fully understood why, but it is more likely after a new sexual partner, using perfumed products or douching, with an IUD, or if you smoke. It is not classed as a sexually transmitted infection.

Do I need antibiotics for BV?

Not always. BV can clear on its own, and the gels and pessaries here can relieve the odour and discharge by restoring the vagina's natural acidity. Your GP can prescribe antibiotics if you need them. These are not available without a prescription. See your GP if symptoms do not improve with treatment or keep coming back.

When should I see a doctor?

See your GP if it is the first time you have had these symptoms, if you are pregnant, if you are unsure what the problem is, or if BV keeps coming back. See them too if you may have a sexually transmitted infection, or if you have pain, a fever, lower tummy pain, bleeding between periods or after sex, or itching, soreness or sores. Also see them if your symptoms have not improved after a full course of treatment.

Can I use BV treatments when pregnant?

If you are pregnant and think you have BV, always see your GP or midwife so it can be checked properly. Check with them before using any of these products.

Will my order be discreet?

Yes. All orders are sent in plain packaging, and our pharmacists can answer questions confidentially through the chat on our website.

Reviewed by Paul O'Hea, MPSI (PSI reg. 8772). Last reviewed October 2026. Always read the patient information leaflet. If you have any questions, you can submit them through the chat on our website and ask for a pharmacist to review.