Bloody Discharge: Possible Causes and When It Is Dangerous

You noticed blood or pink traces on your underwear even though your period is still far off, and you do not understand what it means. Bloody discharge between periods is called intermenstrual bleeding, and it can have many explanations. Most causes are benign and treatable, but a doctor evaluates any unusual bloody discharge without delay.

What is considered bloody discharge

A normal period lasts about 5 days, the total volume of blood loss is approximately 30 to 80 milliliters (about 2–5 tablespoons), and the cycle falls within a range of 21 to 35 days. Anything that does not match this rhythm is bloody discharge, or blood from the vagina outside the expected days. The doctor clarifies where the blood is coming from (vagina, rectum, or urinary tract) and how heavy the discharge is. A doctor's examination most often helps best to find the source of the bleeding, and it can be performed even during the discharge.

Bloody discharge in the middle of the cycle

Bloody discharge in the middle of the cycle is often associated with fluctuations in hormonal levels, the use of an intrauterine device, which can cause occasional spotting, or irregular use of hormonal contraception — for example, when you miss hormonal pills, patches, or rings. Sometimes this is how inflammation of the cervix or endometrium, polyps and uterine fibroids, as well as reduced thyroid function, manifest. Red discharge during pregnancy requires special attention: it may be an ectopic pregnancy, a miscarriage, or other pregnancy complications.

Discharge with mucus and pale pink discharge

Bloody discharge may be associated with trauma or a condition at the entrance to the vagina (for example, during intercourse, infection, a polyp, genital warts, an ulcer, or varicose veins). Bloody discharge can also appear due to vaginal dryness after menopause, when estrogen levels decrease.

Gynecological causes of blood from the vagina

Blood from the vagina between periods may be associated with uterine fibroids, polyps of the cervix or uterus, inflammation of the cervix (cervicitis) or uterus (endometritis), use of anticoagulants, stress, as well as cancer or precancer of the cervix, uterus, and, very rarely, the fallopian tube. After menopause, the risk of cancer with bleeding increases to approximately 10%, so any bloody discharge during this period is evaluated immediately. Uterine bleeding can also be caused by disorders of ovarian hormonal function and endometriosis.

• Bloody discharge outside of your period, especially if it recurs.
• Discharge after menopause.
• Heavy bloody discharge or bleeding lasting longer than 7 days.
• Blood on your underwear together with lower abdominal pain, fatigue, or dizziness.

Which examinations help find the cause

The doctor performs an examination, including a gynecological one, and asks when the discharge appears, how long it lasts, how heavy it is, and whether there are cramps and other symptoms. Possible tests include blood tests for thyroid and ovarian function, a pregnancy test, swabs for sexually transmitted infections, colposcopy with cervical biopsy, endometrial biopsy, a Pap smear, pelvic ultrasound, sonohysterography, and hysteroscopy. Most causes of intermenstrual bleeding are easily treatable, and diagnosis usually does not cause significant discomfort.

When you need to see a doctor urgently

See a doctor without delay if the bleeding is very heavy, if you are pregnant, if bloody discharge appeared after menopause, or if it is accompanied by pelvic pain, fatigue, and dizziness.

Bloody discharge by itself is not always a reason to call an ambulance; 103 or 112 — if the bleeding is massive and sudden or there are signs of acute blood loss and anemia (weakness, dizziness).

Discuss any unusual discharge with a gynecologist — you and your partner can come for a consultation together to calmly understand the causes. This material is for reference purposes and does not replace a doctor's consultation.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer