Heavy menstrual bleeding is one of the most common symptoms of endometriosis, affecting around 40-60% of those with the condition. Whether your period lasts longer than usual, is extremely heavy, or both, it can have a significant impact on your daily life. If you’ve been dealing with unpredictable, excessive bleeding, you’re not alone—and there are reasons why this happens. Let’s break down what’s going on in your body and what you can do to help manage it.
Why does endometriosis cause heavy bleeding?
Endometriosis is a condition where tissue similar to the lining of the uterus (endometrium) grows outside the uterus. This misplaced tissue responds to hormonal changes just like the uterine lining does, but because it has no way to exit the body, it can lead to inflammation, scarring, and other complications—including abnormal bleeding. Here are four main reasons why endometriosis can cause heavy or prolonged periods:
- Disruptions from Endometriosis tissue
Even though endometriosis tissue grows outside the uterus, it can still impact the uterus itself. It disrupts the natural shedding process of the uterine lining, leading to heavier and/or longer periods. In some cases, this can also cause spotting between periods.
- Chronic inflammation
Inflammation is a key player in endometriosis. The immune system reacts to the misplaced endometrial-like tissue, creating a state of chronic inflammation. This triggers the release of prostaglandins—compounds that can increase menstrual cramping and heavy bleeding. Chronic inflammation also affects how the uterus contracts, which can contribute to excessive bleeding.
- Hormonal imbalances
Although endometriosis is not a hormonal disorder, it is hormone-dependent—particularly influenced by estrogen. High estrogen levels can lead to the thickening of the uterine lining, meaning there is more tissue to shed during menstruation. Additionally, endometriosis tissue itself can produce estrogen, further fueling the cycle of excessive bleeding.
- Scar tissue and adhesions
Endometriosis often causes scar tissue and adhesions—bands of fibrous tissue that stick organs together. These adhesions can alter the shape and position of the uterus, leading to abnormal menstrual flow and heavy bleeding.
How to manage heavy bleeding with Endometriosis
While medical treatments like surgery or hormonal therapies are often recommended, nutrition can play a powerful role in managing symptoms naturally. Reducing inflammation through diet is one of the best ways to help regulate your cycle and ease heavy bleeding.
- Focus on anti-inflammatory foods
Eating a diet rich in anti-inflammatory foods can help reduce the chronic inflammation that worsens endometriosis symptoms. Try incorporating:
- Leafy greens like spinach and kale
- Fatty fish (salmon, sardines, mackerel)
- Nuts and seeds (walnuts, flaxseeds, chia seeds)
- Berries (blueberries, strawberries, raspberries)
- Turmeric and ginger
- Balance your hormones naturally
Since excess estrogen can contribute to heavy bleeding, supporting hormone balance is key. Reduce exposure to environmental estrogen-like chemicals (found in plastics and certain beauty products) and support your body’s natural detoxification processes by eating fiber-rich foods like whole grains, legumes, and cruciferous vegetables.
- Support iron levels
Heavy periods can lead to iron deficiency, which can make you feel even more fatigued. Boost your iron intake with foods like:
- Lean red meat
- Lentils and beans
- Dark leafy greens
- Pumpkin seeds
Pairing iron-rich foods with vitamin C sources (citrus fruits, capsicum, tomatoes) can enhance absorption.
Final Thoughts
Heavy bleeding with endometriosis isn’t just an inconvenience—it can be life-altering. Understanding the root causes can help you make informed choices about your health, from medical treatments to lifestyle and dietary changes. While there’s no one-size-fits-all solution, taking steps to reduce inflammation, balance hormones, and nourish your body can make a real difference in your quality of life.
If this resonates with you and you’d like to explore how nutrition can support your journey with endometriosis, I’d love to help. Book your complimentary Endometriosis Discovery Call to learn more about personalised strategies to ease your symptoms and regain control of your health.