Unusual Bleeding: Understanding Heavy or Spotting Symptoms

When bleeding turns out to be the first sign of a cancer, the site of the bleeding usually points at the organ. That is why the first question a clinician asks is not "how much" but "where from," and the second is "is this new for you."

Most unusual bleeding is not cancer. Fibroids, hemorrhoids, urinary infections, ulcers, polyps, anticoagulant medicines, and hormone changes all cause bleeding far more often. But the pathways below exist because a small percentage of each group turns out to be something serious, and the tests are quick.

This is the clearest single rule in the whole topic. Any vaginal bleeding after periods have stopped for a year needs evaluation, always.

About 10 percent of postmenopausal bleeding turns out to be related to endometrial cancer. Guidance is that all postmenopausal women with abnormal uterine bleeding, and all women aged 45 and over with abnormal bleeding, should have the lining of the uterus assessed.

The workup follows a defined sequence:

• Transvaginal ultrasound first. A probe measures the thickness of the endometrium, the uterine lining.
• If the lining is under 4 mm, a biopsy is not needed, because that threshold has a negative predictive value above 99 percent.
• If the lining is 4 mm or more, an endometrial biopsy follows.

There is an important exception, and it is the reason not to relax after a thin measurement. Ultrasound does not fully exclude type 2 endometrial carcinomas, the more aggressive kind. So if bleeding continues despite a lining under 4 mm, tissue still has to be examined.

In premenopausal women the 4 mm number does not apply. There is no endometrial thickness threshold with the same meaning before menopause. Focal thickening is what triggers a biopsy in that group.

One specific group should not wait. Anyone taking tamoxifen for breast cancer who has abnormal uterine bleeding needs examination and endometrial biopsy. Tamoxifen carries an FDA boxed warning about increased uterine cancers.

Vaginal bleeding, bleeding after intercourse, unusual discharge, pelvic pain, and pain during sex are the listed possible signs of cervical cancer. Early cervical cancer often causes none of them.

The evaluation is a pelvic examination, cervical cytology (a Pap smear), HPV testing, and colposcopy with biopsy if anything looks abnormal. Endocervical curettage samples the canal.

Cervical cancer is diagnosed most often in women aged 35 to 44. Most cases are preventable with routine screening, and most cases occur where screening has not reached people.

Bladder cancer typically presents with hematuria, blood in the urine, either visible or found on a dipstick. Less often it causes urinary frequency, needing to pass urine at night, or burning, and those symptoms are more common with carcinoma in situ.

Two features make hematuria more concerning rather than less. Painless bleeding is more worrying than bleeding with the burning of an infection. And bleeding that stops on its own is not reassuring, because bladder tumors bleed intermittently.

The investigations named are cystoscopy, meaning a camera passed into the bladder, along with CT urography or an intravenous pyelogram to look at the kidneys and ureters. Cancers in the upper urinary tract may also cause pain from blockage.

Bright red blood on the paper is most often hemorrhoids. What raises concern is a change in bowel habit lasting weeks, blood mixed through the stool rather than on its surface, weight loss, or iron deficiency anemia found on a blood test.

That last one deserves attention. Iron deficiency anemia in an adult man, or in a woman past menopause, needs a cause found. Slow bleeding from a right-sided colon tumor may never be visible in the toilet.

Black, tarry stool suggests bleeding higher up, in the stomach or small bowel. It is a different investigation and often a more urgent one.

Colonoscopy is the test that both looks and takes tissue.

This pattern is different from the others. It is not one organ bleeding. It is the blood's ability to clot failing, usually because platelets are low.

Petechiae are pinpoint red or purple spots that do not fade when you press a glass against them. Together with bruises appearing without injury, bleeding gums, and nosebleeds that will not stop, they point at the bone marrow. Acute leukemia can present exactly this way, and so can other marrow disorders.

The first test is simply a complete blood count. It is fast, cheap, and available anywhere.

Streaks of blood in phlegm often come from a chest infection or a burst small vessel after violent coughing. Persistent blood, or more than streaks, needs a chest scan.

Hemoptysis is one of the symptoms that lung cancer treatment trials formally track, and it is also a reason certain drugs are avoided. People with a history of coughing up blood are excluded from bevacizumab, because it raises bleeding risk.

• You soak through a pad or tampon every hour for several hours in a row, or pass clots the size of a quarter or larger.
• You vomit blood, or material that looks like coffee grounds.
• Your stools are black and tarry, or the toilet fills with red blood and clots.
• You cough up more than a few streaks of blood.
• Bleeding comes with fainting, dizziness on standing, breathlessness, or chest pain.
• Bleeding will not stop with 10 minutes of firm pressure.

• Any vaginal bleeding after menopause, even one spot, even once.
• Blood in urine, visible or reported on a test.
• Bleeding after sex, or between periods when that is new for you.
• Petechiae, bleeding gums, or repeated nosebleeds.
• Flecks of blood in phlegm lasting more than a few days.

Write down the date, the amount, what you were doing, and any medicine you take that thins blood. That record is more useful to the clinic than a general description.

A Symptom Is Not a Diagnosis, What Symptoms Should I Call My Oncology Team About Today?, and Biopsy.

• https://www.ncbi.nlm.nih.gov/books/NBK525981/
• https://www.cdc.gov/female-blood-disorders/about/heavy-menstrual-bleeding.html
• https://www.cancer.gov/types/uterine/hp/endometrial-treatment-pdq
• https://www.cancer.gov/types/cervical/hp/cervical-treatment-pdq
• https://www.cancer.gov/types/bladder/hp/bladder-treatment-pdq
• https://www.cancer.gov/types/lung/hp/non-small-cell-lung-treatment-pdq