Many women in their 40s notice new joint aches, stiffness that wasn't there before, or a general sense that their body is less forgiving than it used to be. Knees that creak going downstairs, fingers stiff in the morning, lower back pain with no obvious cause.

Because this coincides with getting older, it's easy to attribute to age. But the timing, often accelerating during perimenopause specifically, points to a more specific mechanism: the decline of estrogen in tissues that depend on it, including cartilage, synovial fluid, and connective tissue throughout the musculoskeletal system.

How Common Is This?

A 2024 systematic review and meta-analysis drawing on data from 93,021 women examined musculoskeletal manifestations across menopausal stages.[1] An earlier meta-analysis estimated the overall prevalence of musculoskeletal pain in perimenopausal women at 71%, based on data from 5,836 women.[2] Perimenopausal women showed a higher risk for musculoskeletal pain than premenopausal women.

Osteoarthritis affects roughly twice as many women as men. That gap becomes more pronounced after age 50, when estrogen decline accelerates, suggesting the hormonal transition contributes to the difference.[3]

Why Estrogen Matters in Joints

Estrogen receptors are present throughout joint tissue: in chondrocytes (the cells that make up cartilage), in the synovium (the joint lining that produces lubricating fluid), and in subchondral bone (the bone immediately beneath cartilage).[4] Estrogen actively participates in joint maintenance.

When estrogen declines, several things happen:

Inflammatory signalling increases. Estrogen has anti-inflammatory effects in joints. Its withdrawal activates NF-kB, a signalling pathway that drives pro-inflammatory cytokine production, creating a low-grade inflammatory environment in joint tissue.[5]

Cartilage homeostasis is disrupted. Chondrocytes both synthesize and break down cartilage matrix as part of normal maintenance. Estrogen favours synthesis. Without it, the balance shifts toward breakdown: chondrocyte apoptosis increases and extracellular matrix degradation accelerates.[3][5]

Synovial fluid production declines. The synovium produces hyaluronic acid-rich fluid that lubricates the joint during movement. Reduced synovial fluid directly contributes to friction, stiffness, and pain.[6]

Subchondral bone changes. Estrogen deficiency alters the bone underlying cartilage, affecting how mechanical load is transmitted through the joint and accelerating cartilage degradation from below.[4]

These changes are not the same as normal aging; they are overlaid on top of it. That is why the perimenopausal decade often marks a step-change in joint symptoms rather than a gradual progression.

Which Joints Are Most Commonly Affected?

Knees are the most studied and most commonly affected. Women experience faster knee cartilage deterioration than men, and the difference becomes more pronounced after age 50.[3] The knee is under high mechanical load and has high concentrations of estrogen receptors in its cartilage and synovial lining.

Hands and fingers are frequently affected. Perimenopause-associated inflammatory joint changes can cause symptoms resembling early rheumatoid arthritis: morning stiffness, swelling, and aching in the small joints of the hands. This pattern is sometimes misattributed to rheumatoid arthritis when the driver is hormonal.

The lower back is another common site. A 2023 review in Bone Research examined the relationship between estrogen deficiency and back pain and osteoarthritis, finding that estrogen's role in regulating inflammation and cartilage biology makes it a relevant factor in both.[7]

FSH and Inflammation

Research has also implicated follicle-stimulating hormone (FSH) in joint inflammation, independent of estrogen's effects. FSH levels rise sharply during perimenopause as the pituitary responds to declining ovarian estrogen. A 2025 study found FSH enhances the inflammatory response of macrophages in knee joint tissue, potentially through the NF-kB pathway.[8] This is consistent with earlier data showing that appendicular lean mass changes during perimenopause correlate more closely with FSH elevation than with estradiol decline.[9]

The practical implication: joint inflammation during perimenopause may not fully resolve by stabilising estrogen alone, since FSH remains elevated throughout the transition regardless.

What Helps

Exercise is the most consistently supported intervention. Regular moderate exercise, including low-impact aerobic activity (cycling, swimming, walking) and resistance training, reduces joint pain and maintains cartilage health better than rest.[10] Cartilage has no blood supply and depends on the compression and decompression of movement to receive nutrients. Inactivity accelerates deterioration.

Weight management reduces mechanical load. Every kilogram of body weight adds approximately four kilograms of force to the knee during walking. For women experiencing perimenopausal weight gain alongside joint changes, the combination is hard on the knees. Even modest weight loss reduces knee pain and slows cartilage degradation.

Distinguish inflammatory stiffness from mechanical pain. Stiffness worst in the morning that improves with movement is more consistent with the inflammatory pattern associated with estrogen decline. Mechanical pain that worsens with activity and eases with rest suggests a different pattern. The distinction matters for how you approach management.

HRT may have a protective effect on joints. The evidence is observational, not from randomised trials designed around joint outcomes. Several large studies have found lower rates of knee osteoarthritis and fewer total joint replacements in postmenopausal women who used HRT compared to those who did not.[3][5] This is consistent with the biological mechanism. For women who are already candidates for HRT based on their overall symptom profile, joint health is a legitimate part of the benefit-risk discussion.

When to See a Doctor

Joint pain that is sudden, severe, involves significant swelling or redness, or is confined to a single joint should be evaluated clinically. These patterns are more consistent with gout, infection, or inflammatory arthritis than with the diffuse, bilateral, perimenopausal pattern described above.

For widespread joint stiffness and aching that appeared during perimenopause, coincides with other transition symptoms, and affects multiple joints symmetrically, the context of the menopausal transition is relevant and worth raising with whoever manages your primary care.

References

[1] Gaber, T. A., et al. (2024). Musculoskeletal manifestations of perimenopause: A systematic review and meta-analysis of 93,021 women. https://pmc.ncbi.nlm.nih.gov/articles/PMC12784006/

[2] Dario, A. B., Cabral, A. M. V., Almeida, L., et al. (2021). Musculoskeletal pain during the menopausal transition: A systematic review and meta-analysis. Menopause, 28(4). https://pmc.ncbi.nlm.nih.gov/articles/PMC7710408/

[3] Xiao, Y. P., Tian, F. M., Dai, M. W., et al. (2021). Are estrogen-related factors associated with menopausal knee osteoarthritis? A systematic review and meta-analysis. Journal of Orthopaedic Surgery and Research, 16, 191. https://pmc.ncbi.nlm.nih.gov/articles/PMC11860234/

[4] Tanamas, S. K., Wijethilake, P., Wluka, A. E., et al. (2011). Sex hormones and structural changes in osteoarthritis: A systematic review. Maturitas, 69(2), 141-156. https://pmc.ncbi.nlm.nih.gov/articles/PMC2787275/

[5] Liu, S., Deng, Z., Chen, K., et al. (2022). Cartilage tissue engineering: From proinflammatory and anti-inflammatory aspects. Frontiers in Bioengineering and Biotechnology. See also estrogen/OA mechanism: https://pubmed.ncbi.nlm.nih.gov/23352515/

[6] Roman-Blas, J. A., Castaneda, S., Largo, R., Herrero-Beaumont, G. (2009). Osteoarthritis associated with estrogen deficiency. Arthritis Research and Therapy, 11(5), 241. https://pmc.ncbi.nlm.nih.gov/articles/PMC2787275/

[7] Chen, L., Zheng, J. J. Y., Li, G., et al. (2023). Pathogenesis and clinical management of obesity-related knee osteoarthritis: Impact of mechanical loading. Journal of Orthopaedic Translation. See also: Low back pain and osteoarthritis pain: a perspective of estrogen. Bone Research. https://www.nature.com/articles/s41413-023-00280-x

[8] Chen, W., et al. (2025). FSH enhances the inflammatory response of macrophages in the knee joint possibly through the NFkB pathway. https://pmc.ncbi.nlm.nih.gov/articles/PMC11961395/

[9] Greendale, G. A., Sternfeld, B., Huang, M., et al. (2019). Changes in body composition and weight during the menopause transition. JCI Insight, 4(5). https://pmc.ncbi.nlm.nih.gov/articles/PMC7272749/

[10] Fransen, M., McConnell, S., Harmer, A. R., Van der Esch, M., Simic, M., Bennell, K. L. (2015). Exercise for osteoarthritis of the knee: a Cochrane systematic review. British Journal of Sports Medicine, 49(24), 1554-1557. https://doi.org/10.1136/bjsports-2015-095424