Brown Discharge After Your Period: What It Usually Means

Brown discharge after your period is usually old blood that is slow to leave your uterus (womb). When blood mixes with vaginal fluid, it turns brown, and this often shows up a day or two after a period ends, so on its own it is normally nothing to worry about.

It is worth a check when the discharge is new for you, keeps coming back, smells bad, itches, or comes with pain or a fever. This guide explains why the colour changes, what else can cause it, and when to see a doctor.

Why blood turns brown

Blood that stays in the body for longer reacts with oxygen and gets darker. Dark period blood is older blood that has been in the uterus longer, and the last days of a period are usually the darkest. Near the end, the flow is slow, so the last small amounts of blood take time to come out and have time to turn brown.

The colour of period blood is rarely a worry on its own. How much you bleed, how long it lasts and how you feel tell a doctor more. If your periods are heavy or you pass large clots, read the signs you are losing too much blood and blood clots during your period instead.

When brown discharge after a period is common

Brown discharge is most likely normal when:

• it starts on the last day of your period or within a day or two after it
• it is a small amount, such as marks on your underwear or on toilet paper
• it stops on its own after a few days
• it has no strong smell and you have no itching, soreness or pain
• it happens in a similar way after most periods

Other causes of brown discharge

Hormonal contraception

Bleeding on the pill, patch, ring, implant or a hormonal IUD is often called breakthrough bleeding. It is usually dark brown or light red, and hormonal birth control is its most common cause. It is more likely in the first months of a new method, or after missed pills.

Many people with endometriosis or adenomyosis take hormones as treatment, so brown spotting can show up at the start. Do not stop a treatment on your own because of it. Ask your doctor or nurse first.

Infections

Some vaginal infections can make discharge look brown.

• Bacterial vaginosis (BV) usually causes greyish discharge with a fishy smell, but it can look brownish once it dries on underwear.
• Trichomoniasis is a sexually transmitted infection. It can cause flecks of blood, so the discharge looks brown, often with a bad smell.
• Chlamydia or gonorrhoea can cause discharge with pelvic pain or bleeding.

These infections need a test and usually a short course of treatment. A GP or a sexual health clinic can help.

Polyps, fibroids and endometriosis

Polyps, fibroids and endometriosis can all cause bleeding between periods. When this blood is slow to leave the body, it can look brown.

With endometriosis, you may also have painful periods or pain at other times in your cycle. Adenomyosis mostly causes heavy and painful periods. If that sounds like you, read adenomyosis symptoms for the full list of signs.

A scar niche after a C-section

A caesarean (C-section) can leave a small pocket in the scar on the uterus, called a niche. In a large review of studies, people with a scar niche were more likely to have unusual bleeding, often longer periods and spotting in the days after a period, most often described as brown discharge. Most people with a niche do not have bleeding problems.

If you have had a C-section and your periods now end with many days of brown discharge, tell your doctor. Our guide to painful periods after a C-section explains the scar niche in more detail.

Menopause

Lower oestrogen (estrogen in the US) around the menopause can thin the vaginal walls, and some light bleeding can follow. If you are in or near the menopause and notice brown discharge, talk to a gynaecologist, so they can check that the blood is not coming from the uterus.

What to note before your appointment

A short record helps your doctor find the cause faster. Write down:

• the first and last day of each period
• the days you see brown discharge and how many days it lasts
• the amount (marks on toilet paper, a liner or a pad)
• any smell, itching, soreness or pain, and where the pain is (0 to 10)
• your contraception or hormone treatment and any missed pills
• if you have had a C-section
• any chance you could be pregnant

Two or three cycles of notes show if the discharge follows a pattern. Endolog, the endometriosis pain and symptom diary, is a free download with an optional in-app subscription. You can log bleeding, pain and other symptoms each day and share a report at your appointment.

When to see a doctor

Book an appointment with a GP, your gynaecologist or a sexual health clinic if:

• your discharge changes colour, smell or texture and this is new for you
• it smells bad or fishy
• you feel itchy or sore, or it hurts when you pee
• you have pelvic pain or a fever
• you bleed between periods or after sex
• spotting happens often, or turns into heavy bleeding, especially with pelvic pain
• bleeding on hormonal contraception lasts more than three months
• you are pregnant or could be pregnant

Bleeding after the menopause

If you have had no period for a year or more, any brown discharge or bleeding needs a check. See a GP if you notice bleeding from your vagina after the menopause, even if it is a small amount or it happened only once.

Related guides

• Signs You're Losing Too Much Blood During Your Period
• Blood Clots During Period: What Is Normal and When to Worry
• Adenomyosis Symptoms: Heavy Periods, Pain and What to Track
• Painful Periods After a C-Section: Causes and When to Worry