{"id":57624,"date":"2026-05-05T02:03:12","date_gmt":"2026-05-05T02:03:12","guid":{"rendered":"https:\/\/blog.hormona.io\/?p=57624"},"modified":"2026-05-05T02:03:27","modified_gmt":"2026-05-05T02:03:27","slug":"perimenopause-heavy-bleeding","status":"publish","type":"post","link":"https:\/\/blog.hormona.io\/blog\/perimenopause-heavy-bleeding\/","title":{"rendered":"Perimenopause heavy bleeding: Causes, clots, & when to worry"},"content":{"rendered":"

Is heavy bleeding normal in perimenopause?<\/span><\/h2>\n

The short answer is that while it isn’t ‘normal,’ it is a common symptom. Many women experience heavy periods in perimenopause due to expected hormonal fluctuations that occur during this life transition. During perimenopause, rising and falling hormone levels often mean you stop ovulating regularly. Without ovulation, the uterine lining continues to build up under the influence of estrogen without being transformed by progesterone. This buildup is what causes the heavy or prolonged bleeding common during this transition.<\/span><\/p>\n

If your blood flow is rapid and significant, accompanied by dizziness, rapid heart rate, and shortness of breath, it may be a sign of a hemorrhage, and you should seek medical attention immediately.<\/span><\/p>\n

How to measure \u201cheaviness\u201d of flow<\/span><\/h2>\n

One in five women<\/span><\/a> experiences heavy menstrual bleeding, but it can be <\/span>challenging to determine<\/span><\/a> what blood flow is \u201cheavy\u201d and what is \u201cnormal\u201d. Clinically, more than 80 ml blood loss is considered heavy menstrual bleeding, but what does that look like in the real world?\u00a0<\/span><\/p>\n

To start, it could be soaking through protection within an hour. With regular menstrual bleeding, it should take between two to eight hours to soak through a pad or tampon, depending on the absorption level, so changing pads every hour is considered heavier than average bleeding.\u00a0<\/span><\/p>\n

Secondly, having to wake up throughout the night to change your pad or tampon is another sign of heavy menstrual bleeding. Finally, if you use double protection and that\u2019s still not enough, your period would be defined as \u201cheavy\u201d.\u00a0<\/span><\/p>\n

Signs of \u201cflooding\u201d and blood clots<\/span><\/h2>\n

Have you ever noticed a sudden gush of blood when you\u2019re on your period that happens without warning? This \u201cflooding\u201d can be embarrassing, especially if it happens when you\u2019re out with friends, at work, or exercising. There are a few reasons why you may experience \u201c<\/span>flooding\u201d in perimenopause<\/b>, including if you have <\/span>uterine polyps<\/span><\/a>, uterine fibroids, or other medical conditions.\u00a0<\/span><\/p>\n

Uterine polyps grow on the inner wall of your uterus. Uterine fibroids are noncancerous tumors in the uterine wall that can cause heavy bleeding, trouble urinating, and fertility issues.\u00a0<\/span><\/p>\n

Another common occurrence during perimenopause is a heavy period with clots. While they can be unnerving to see, not all blood clots are dangerous, so knowing how to differentiate them is important.\u00a0<\/span><\/p>\n

What do dangerous clots look like?<\/span><\/h3>\n

Looking down and seeing a blood clot can be alarming, especially if it\u2019s large. However, blood clots are normal during your period. If you have dark red clots that are dime-sized or below, there\u2019s typically nothing to worry about. However, if you see quarter-sized clots to golf ball sized clots or larger, it could indicate a bigger issue.\u00a0<\/span><\/p>\n

While there are numerous possible reasons you may have larger clots, the most common include uterine fibroids, polyps, and adenomyosis. Clotting with heavy periods in perimenopause can also be caused by the hormonal imbalance associated with the transition, so it\u2019s a good idea to make a GP appointment where your doctor can perform a pelvic exam and look for underlying issues.\u00a0<\/span><\/p>\n

Why is this happening?<\/span><\/h2>\n

As we\u2019ve already mentioned, during perimenopause, there are times when estrogen levels in the luteal phase rise significantly higher than they typically did in the past. Simultaneously, progesterone decreases, causing longer cycles where the uterine lining has more time to grow. This thick endometrial lining results in heavier bleeding when it sheds, causing excessive blood loss.\u00a0<\/span><\/p>\n

But heavy bleeding in perimenopause isn\u2019t always due to high estrogen and low progesterone \u2013 there are conditions that cause it as well. <\/span>Endometrial hyperplasia<\/span><\/a>, where the uterine lining is too thick, uterine fibroids, polyps, thyroid issues, blood clotting issues could also be responsible.\u00a0<\/span><\/p>\n

Hormonal chaos vs. medical red flags<\/span><\/h3>\n

Distinguishing between hormonal causes of heavy bleeding during perimenopause and structural and clotting issues can be challenging. Understanding the symptoms can help you better understand whether you should talk to your doctor. Below is a quick glance table of common symptoms associated with uterine fibroids, polyps, and adenomyosis.<\/span><\/p>\n

 <\/p>\n\n\n\n\n\n\n
<\/td>\nSymptoms<\/b><\/td>\n<\/tr>\n
Fibroids<\/b><\/td>\n\n
    \n
  • Heavy and prolonged bleeding<\/span><\/li>\n
  • Bleeding between periods<\/span><\/li>\n
  • Feeling of heaviness or fullness in lower abdomen<\/span><\/li>\n
  • Frequent urination<\/span><\/li>\n
  • Difficulty emptying bladder<\/span><\/li>\n
  • Constipation<\/span><\/li>\n
  • Painful sex<\/span><\/li>\n
  • Lower back pain<\/span><\/li>\n
  • Protruding or enlarged abdomen<\/span><\/li>\n
  • Fatigue<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Polyps<\/b><\/td>\n\n
    \n
  • Heavy bleeding\u00a0<\/span><\/li>\n
  • Bleeding between periods<\/span><\/li>\n
  • Periods lasting longer than usual<\/span><\/li>\n
  • Prolonged spotting arounds periods<\/span><\/li>\n
  • Spotting after menopause<\/span><\/li>\n
  • Spotting or bleeding after sex<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Adenomyosis<\/b><\/td>\n\n