HAIR RELAXER GUIDE · FIBROIDS
Hair Relaxers and Fibroids
Last updated: June 9, 2026
Most coverage of hair relaxer health concerns focuses on cancer, but uterine fibroids are a separate condition that some people research after using these products. Some studies have examined a possible association, and the proposed biological reasoning overlaps with the cancer research. This page explains what fibroids are, what the research suggests, and an important practical point: fibroid claims sit differently in the litigation than cancer claims.
For the cancer side of this topic, see Does Hair Relaxer Cause Cancer?
This page provides general educational information only and does not constitute medical or legal advice. Discuss any diagnosis or symptom with a qualified medical professional.
- Some studies have reported an association between hair relaxer use and uterine fibroids; causation is not established.
- Fibroids are very common and have many contributing factors, which makes isolating any single cause difficult.
- The proposed mechanism overlaps with the cancer research: endocrine-disrupting chemicals that can affect hormone pathways.
- Fibroid claims are generally handled differently from the cancer claims at the center of the federal litigation.
What Uterine Fibroids Are
Uterine fibroids are common non-cancerous growths that develop in or on the uterus. They can cause heavy menstrual bleeding, pelvic pain or pressure, and other symptoms, though many people have fibroids without symptoms at all. Because they are so common, particularly during the reproductive years, researchers studying any possible contributing factor have to account for a high baseline rate.
What the Research Has Examined
Some epidemiological research, including work focused on populations of Black women who use these products more frequently, has examined whether chemical hair relaxer use is associated with a higher occurrence of fibroids. As with the cancer research, these studies report associations rather than proven causation, and the very high prevalence of fibroids makes the analysis especially complex. For the broader research picture, see The Hair Relaxer Cancer Studies, Explained.
The Proposed Mechanism
The biological reasoning is similar to the cancer discussion. Researchers have pointed to endocrine-disrupting chemicals that can be present in some products, such as certain phthalates, parabens, and formaldehyde-releasing preservatives, which can interfere with hormone pathways. Because fibroid growth is influenced by hormones, that is one proposed explanation under study. It remains a research question, not a settled conclusion.
Association Is Not Causation
This point applies with particular force to fibroids. Given how common they are and how many factors influence them, an association reported in a study does not establish that a product caused any individual's fibroids. A personal question about cause can only be addressed by a medical professional who knows the full clinical picture.
How Fibroid Claims Fit the Litigation
This is the practical distinction worth understanding. The federal multidistrict litigation has centered on uterine, endometrial, and ovarian cancer, which have the strongest scientific support. Fibroid-related claims are generally being handled separately, often in state court, and how they are treated can depend on the specific facts and applicable law. If you are wondering whether a fibroid history fits anywhere in this picture, that is a question for an attorney. For the legal overview, see Hair Relaxer Cancer Lawsuit and Hair Relaxer Lawsuit Updates.
What This Means for You
If you have fibroids and used chemical hair relaxers, the first step for any health question is a conversation with your doctor. If you also want to understand whether your situation has any legal dimension, a case review can help clarify how fibroid claims are currently being treated, which differs from the cancer claims.
Used chemical hair relaxers and later diagnosed with a related condition? A free, no-obligation case review on Lawsuit Center can help you understand how different claim types are currently being handled.
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