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It is normal and healthy to produce a clear or white discharge from your vagina.
This mucus is produced naturally from the neck of the womb, known as the cervix.
The amount of vaginal discharge varies throughout your menstrual cycle (brown discharge is usually the end of your period) and most pregnant women will get a 'pregnancy discharge'.
Healthy discharge does not have a strong smell or colour. You may feel an uncomfortable wetness, but you should not have any itching or soreness around your vagina.
Any sudden change to your discharge may indicate a vaginal infection. You should be aware of how your discharge naturally varies throughout your cycle and what is not normal, but obvious warning signs of infection are:
If you are not sure whether your discharge is normal and are worried about it, see your doctor or nurse.
There are many possible causes of abnormal vaginal discharge, but it is usually a sign of infection. The infection is often caused by something that upsets the natural balance of bacteria or yeast in your vagina, such as washing inside the vagina, or it may be sexually transmitted.
The most common causes are:
The guide below may help you identify the cause of your discharge. However, it is important to see your doctor for a proper diagnosis and for advice on how to treat the infection.
If your discharge is thin and watery or thick and white (like cottage cheese), you may have thrush. This common fungal infection causes intense itchiness and soreness around your vagina. The discharge may smell slightly yeasty, but does not have a strong smell.
Almost all women get thrush from time to time and it is not sexually transmitted. It is easily treated with antifungal medicine, which can be bought over the counter from your pharmacist.
If your vaginal discharge is grey or develops a strong fishy smell, particularly after sexual intercourse, you could have bacterial vaginosis (BV). BV is an imbalance in the normal bacteria found in your vagina. It does not usually cause itching or irritation.
Like thrush, BV is very common and is not sexually transmitted. It is easily treated with antibiotics. See your doctor for a prescription.
Trichomoniasis is a common STI caused by a tiny parasite. It can make your vaginal discharge frothy, yellow or green. You may have a lot of discharge, which may also have an unpleasant fishy smell. Other possible symptoms are soreness, swelling and itching around the vagina, and pain when passing urine.
Trichomoniasis is easily treated with an antibiotic called metronidazole, which your doctor will prescribe. If you have trichomoniasis you should visit a local GUM or sexual health clinic as it can exist alongside other STIs.
If your vaginal discharge is abnormal and you have pain in your pelvis or when you urinate, or you bleed between periods or after sex, you may have chlamydia or gonorrhoea (both STIs). Gonorrhoea can make your discharge turn green, although often the pain or bleeding are more noticeable.
If you have any of these symptoms, see your doctor or go to a genitourinary medicine (GUM) clinic as soon as possible for treatment with antibiotics. Untreated gonorrhoea or chlamydia may spread upwards and lead to pelvic inflammatory disease, a serious infection of the womb, fallopian tubes or ovaries.
Genital herpes can cause painful, red blisters or sores to appear around your genitals, as well as an abnormal vaginal discharge. See your doctor or go to a genitourinary medicine (GUM) clinic as soon as possible. You may be offered a course of antiviral tablets, which will stop the herpes virus multiplying, but the symptoms may have a tendency to return.
It is unusual for young girls to have abnormal vaginal discharge before they have gone through puberty. If this happens, they should see a doctor. There may be a lost object inside their vagina, such as a tampon.
Abnormal discharge is also unusual in older women. If you have gone through the menopause and suddenly notice an abnormal vaginal discharge, see your doctor as soon as possible to rule out cervical cancer or endometrial cancer.
Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.