Spotting Between Periods: Causes, Symptoms and When to See a GP

Spotting is defined as very light vaginal bleeding that occurs at any time in your menstrual cycle other than during your actual period. In the UK, medical professionals often refer to this as intermenstrual bleeding. Unlike a normal period, which typically requires a pad or tampon, spotting is often just a few drops of blood seen on toilet paper or a light staining on underwear.

The colour of the blood can range from bright red to a dark, rusty brown. While many women and people with periods experience this occasionally without a serious underlying cause, any new or persistent pattern of bleeding between periods should be investigated to ensure your reproductive health is at its best. Following NHS and NICE guidance, doctors aim to identify whether the cause is hormonal, related to the cervix, or linked to other pelvic conditions.

There are several reasons why you might experience bleeding mid-cycle. Understanding these can help you track your symptoms more effectively for a GP consultation.

Hormonal Contraception

One of the most frequent causes of spotting in the UK is the use of hormonal contraceptives. This is often called 'breakthrough bleeding'. It is particularly common during the first three to six months of starting:

• The combined oral contraceptive pill.
• The progesterone-only pill (mini-pill).
• The contraceptive implant or injection.
• Intrauterine systems (IUS) like the Mirena coil.

Ovulation Spotting

Some women notice light spotting around the time they ovulate (usually mid-cycle). This is often due to the sudden shift in oestrogen levels when the egg is released from the ovary.

Hormonal Imbalances

Fluctuations in oestrogen and progesterone can cause the lining of the womb to shed slightly at the wrong time. This is more common in those approaching the menopause (perimenopause) or individuals with conditions that affect hormone regulation.

Infections and STIs

Certain sexually transmitted infections, such as chlamydia or gonorrhoea, can cause inflammation of the cervix (cervicitis), leading to bleeding between periods or after sex. If you are sexually active, a regular STI screen is recommended by the British Association for Sexual Health and HIV (BASHH).

Sometimes, the cause of spotting is physical rather than hormonal. These are usually benign (non-cancerous) but may require treatment to stop the bleeding.

• Cervical Ectropion: This is a very common condition in the UK where the cells from the inside of the cervical canal grow on the outside of the cervix. These cells are more fragile and can bleed easily, especially after intercourse.
• Uterine or Cervical Polyps: Small, bulb-like growths on the lining of the womb or the cervix can cause irregular bleeding.
• Fibroids: Non-cancerous growths in or around the womb that can cause heavy periods and occasional spotting.
• Pregnancy Complications: Very light spotting can occur in early pregnancy (implantation bleeding), but it can also be a sign of an early miscarriage or an ectopic pregnancy.

If you are worried about changes to your cycle, you can speak to a GP online for a convenient initial assessment. An online GP can help by taking a detailed history of your menstrual cycle, discussing your current contraception, and reviewing any other symptoms like pelvic pain or unusual discharge.

During a consultation, the doctor will likely ask:

• When the spotting started and how often it occurs.
• Whether the bleeding happens after sex (postcoital bleeding).
• When your last cervical screening (smear test) was performed.
• If you have any pain or discomfort in your lower abdomen.

An online doctor can provide advice on whether you need a physical examination, a referral for an ultrasound, or a pelvic exam at a local clinic. They can also issue sick notes if your symptoms are affecting your ability to work, or offer guidance on switching contraception if that is the suspected cause.

Following a consultation, a UK healthcare provider may recommend several steps to find the cause of the spotting. NICE guidelines suggest a staged approach based on your age and risk factors.

• Cervical Screening: Ensuring you are up to date with your smear test is the first step in ruling out cervical cell changes.
• STI Testing: A simple swab or urine test can rule out infections that cause inflammation.
• Pelvic Ultrasound: This scan looks at the thickness of the womb lining and checks for fibroids, polyps, or ovarian cysts.
• Blood Tests: These may be used to check thyroid function or hormone levels, especially if you have other symptoms of perimenopause.
• Hysteroscopy: In some cases, a specialist may need to look inside the womb using a small camera to identify polyps or fibroids.

While waiting for a medical review, keeping a 'menstrual diary' is incredibly helpful. You can use a paper diary or one of the many cycle-tracking apps available. Recording exactly which days you bleed, the flow level, and any triggers (such as sex or exercise) gives your doctor a clearer picture of the pattern.

Maintaining general vaginal health is also important. Avoid douching or using scented soaps in the genital area, as these can irritate the delicate tissues of the vagina and cervix, potentially making spotting more likely if inflammation is present.