Brown Discharge: Causes, Colours and When to Worry

Medically reviewed by Dr. Bhimi Daimari, MBBS, MS (Obstetrics and Gynaecology) · Review date: 10 November 2026

You check your underwear or the tissue and see a brown stain. It is not your period, it does not look like normal discharge, and the first thought is usually “is something wrong?” Most of the time, the answer is no. Brown discharge is usually old blood that took a little longer to leave the body. This guide explains the common reasons for brown discharge, what it means before or after your period, when it can be a sign of pregnancy, and the signs that mean you should see a doctor.

What is brown discharge?

Blood is red when it is fresh. When it stays in the uterus or vagina for a while before coming out, it reacts with oxygen and turns brown, dark brown or almost black. That is the same reason a cut on your skin turns darker as it dries.

So brown discharge is usually a small amount of old blood mixed with the normal fluid your vagina makes every day. It can look like:

• light brown or tan stains on a panty liner
• brown streaks when you wipe
• dark brown, sticky or “coffee-ground” discharge

The colour on its own rarely tells you the cause. Timing in your cycle, how long it lasts and other symptoms tell you much more.

Common reasons for brown discharge

These are the causes doctors see most often. Most are harmless.

• The start or end of your period. Slow bleeding at the beginning or the last few days of a period is often brown.
• Ovulation spotting. A small hormone shift around the middle of your cycle can cause a little spotting.
• Implantation bleeding. Light pink or brown spotting can happen around the time a pregnancy implants, usually a few days before a missed period. Read more about implantation bleeding and pregnancy tests.
• Hormonal birth control. Pills, the implant, injections and hormonal IUDs often cause brown spotting, especially in the first three months or after missed pills.
• Irritation of the cervix. Sex, a pelvic examination or a smear test can cause a small bleed that shows up brown a day later.
• After pregnancy, miscarriage or abortion. Bleeding after birth (lochia) and after a pregnancy ends usually changes from red to brown before it stops.
• Perimenopause. In your 40s, cycles become irregular and brown spotting between periods is more common.

Less common causes include infection (such as bacterial vaginosis, chlamydia or gonorrhoea), cervical or uterine polyps, polycystic ovary syndrome (PCOS), thyroid problems, a forgotten tampon and, rarely, changes in the cervix or the lining of the uterus that need treatment. These are the reasons why brown discharge that keeps coming back should be checked.

Brown discharge before your period

Brown discharge in the 1 to 3 days before your period is very common. As the lining of the uterus starts to break down, a little blood comes out slowly, darkens and appears as brown spotting. A normal red flow then follows.

If you have brown spotting for many days before every period, or it has started recently and keeps happening, mention it to your doctor. Hormonal imbalance, polyps or fibroids can sometimes cause this pattern.

Brown discharge after your period

This is just the last of your period leaving the body. Blood from the final days flows slowly, so it is darker. Brown discharge for a day or two after a period is normal. If it goes on for more than a week after your period ends, see a doctor.

Brown discharge 2 weeks after your period

About two weeks after your period started is when many women ovulate. A small drop in oestrogen around ovulation can cause light spotting that looks pink or brown, sometimes mixed with clear, stretchy discharge. It usually lasts a day or two.

If you are trying to conceive, this can be a useful sign of your fertile time. If you are not, and the spotting happens every month or is getting heavier, get it checked.

Why do I have brown discharge but no period?

When brown discharge comes instead of your expected period, the common reasons are:

• early pregnancy (including implantation bleeding)
• hormonal contraception, which can make periods very light
• stress, weight change, illness or heavy exercise, which can delay ovulation
• PCOS or thyroid problems
• breastfeeding and the months after giving birth
• perimenopause

If your period is late and you have had sex, take a home pregnancy test. Use your first morning urine for the clearest result.

Brown discharge in pregnancy

Brown spotting is common in the first trimester and is often not a sign of a problem. It can come from implantation, a sensitive cervix (especially after sex or an internal scan) or a small collection of blood next to the pregnancy sac that is slowly clearing.

Brown discharge in pregnancy needs a doctor’s check the same day if:

• it turns red or becomes heavier
• you have cramps or pain on one side of your lower abdomen
• you feel dizzy, faint or have shoulder-tip pain (a possible sign of an ectopic pregnancy; see also pregnancy of unknown location)
• you pass clots or tissue

Read more in our guide to how much bleeding is normal in early pregnancy and early pregnancy discharge.

Brown discharge when you wipe

A brown streak on toilet paper with no other symptoms is usually old blood from the very start or end of a period, ovulation, or a little irritation after sex. Note when it happens in your cycle. If you see it after sex more than once, see a doctor, because bleeding after intercourse should always be checked.

Light brown, dark brown and black discharge

• Light brown or tan: a small amount of old blood mixed with a lot of normal discharge. Very common at the start or end of a period or around ovulation.
• Brown: old blood, as above. Timing and symptoms matter more than the shade.
• Dark brown or black: blood that has been inside for longer. Common at the end of a period. If it comes with a strong smell, it can mean a forgotten tampon or an infection.
• Grey with a fishy smell or green or yellow discharge points to infection rather than old blood. Arabic readers can read about yellow discharge (الإفرازات الصفراء).

Warning signs: see a doctor

What the doctor will check

Your doctor will ask about your cycle, your contraception, your sexual history and any chance of pregnancy. Depending on your age and symptoms, the check may include:

• a pregnancy test
• a gentle examination and swabs to look for infection
• a cervical screening test if you are due one
• a pelvic ultrasound to look at the uterus, lining and ovaries
• blood tests for hormones, thyroid or anaemia

Treatment depends entirely on the cause. Many women need no treatment at all, just reassurance.

What you can do at home

• Use unscented panty liners and change them often.
• Wash the outside area with plain water. Do not douche or use scented washes inside the vagina.
• Track your cycle and spotting days in an app or a period calculator. This helps your doctor a lot.
• If you use the pill, take it at the same time each day.

Arabic readers can read our guide to brown discharge in Arabic (الإفرازات البنية).

Frequently Asked Questions

What is the reason for a brown discharge?

In most women it is simply blood that left the uterus slowly and darkened on the way out. That is why it is so common on the first and last days of a period. A new or changing pattern, such as brown spotting every month between periods, is the point to see a doctor, because the reason is then more likely to be hormonal, a polyp or an infection.

Is it normal to have brown discharge but no period?

Once in a while, yes. A single light, brown “period” can happen after a stressful month, a change in weight or when you have just started or stopped the pill. If it happens two or three cycles in a row, or you could be pregnant, take a pregnancy test and see a doctor.

Does brown discharge mean pregnant?

Not by itself. It can be implantation bleeding, but most brown discharge is not caused by pregnancy. A home test is reliable from the day your period is due. If it is negative and your period still does not come, repeat it after three days.

When to worry about brown discharge?

Think about three things: how long it lasts, whether it is new for you, and your stage of life. Brown discharge that lasts more than a week, a pattern you have never had before, and any bleeding after menopause all deserve a check, even if you feel well.

Sources

• Cleveland Clinic: Brown discharge
• NHS: Vaginal discharge
• NHS: Bleeding between periods
• ACOG: Abnormal uterine bleeding

Medical disclaimer: This article is for general education only. It does not replace advice, diagnosis or treatment from a qualified doctor. If you are bleeding heavily or in severe pain, go to the nearest emergency department.