There are many different causes of pain in your body, many different experiences of pain (such as throbbing, stabbing, aching, or pinching) and many different approaches to treating pain.
Medically, pain is classified based on the nerve pathways that are used to signal the brain. The first type is called nociceptive pain, which results from the stimulation of specialized nocioceptor cells. The second type is called neuropathic pain, which results from the stimulation of any nerve cells, not just the nocioceptor cells. This is important to understand as these types of pain have different causes and therefore different treatment approaches.
Nociceptors are specialized nerve cells located on the surface of the skin and throughout most of the body. These receptors are highly sensitive and detect changes in temperature or pressure, and the presence of toxic or injury-causing chemicals.
Nociceptive pain is caused by any damage to body tissues that activates the nociceptors through a direct stimulus. Once they are activated, the nociceptors transmit signals to the brain that cause a protective response. For example, if the nociceptors detect an extreme temperature and signal your brain, your brain will, in turn, signal your muscles to pull your hand away from the stove. Nociceptive pain goes away when the stimulus (in this example, the hot temperature) stops. [1]
Neuropathic pain is caused by damage or dysfunction (such as inflammation, irritation, or neural tissue compression) within the nervous system itself. The damaged nerve cells can send spontaneous signals to the brain that are interpreted and felt as pain or the damaged cells can amplify normal pain responses.
Neuropathic pain can be experienced long-term or it can be resolved more quickly if the underlying damage is repaired. For example, if a tumour is pressing on nerve cells that will cause them to send pain signals to the brain. If treatment of some sort shrinks the tumour so it stops pressing on the nerve cells, the pain will stop. Unfortunately, many causes of chronic neuropathy are not easy to diagnose and so they are not easy to fix.
Nociceptor pain can become neuropathic pain. The nocioceptors stop signalling pain once the stimulus is removed, but the stimulus event may have caused underlying damage to the tissues. This damage can then affect the nerves in the same way as neuropathic pain. For example, if you twist your ankle, the nocioceptors will fire and you will feel pain because your ankle ligaments moved in a way they are not designed to move. However, damage to the ligaments will have caused swelling and inflammation, and that will trigger your nerves to send pain signals. You will continue to feel pain until the underlying damage is healed.
Regardless of internal nervous system pathways, pain is also classified as either acute or chronic pain. Acute pain happens quickly based on a clear stimulus and it goes away when the stimulus stops. Stubbing your toe is a type of acute pain. Your toe hits a hard object and the pain starts immediately. Chronic pain, on the other hand, doesn’t always have a clear cause and there is no obvious external stimulus. Pain is diagnosed as chronic when it lasts for more than six months.
Emerging evidence is showing that hormone changes during the menopausal transition create inflammation throughout the body. In addition to its role in the reproductive system, estrogen is a ‘master regulator’ impacting multiple female body systems. For example, estrogen protects the body from insulin resistance and type II diabetes as well as regulating metabolism. Estrogen also regulates inflammasomes, which are a key part of the immune response and that are responsible for the activation of inflammatory responses. [9]
During the menopausal transition, some women find that they experience pain – either new pain or more pain than usual – in different areas of their bodies. This pain is almost always neuropathic pain and it happens because lowered levels of estrogen are associated with chronic low-grade inflammation. Inflammation results in the buildup of fluid that pushes against nerve endings and results in neuropathic pain of various types (constant, throbbing, etc.) and severity. It appears that changes in estrogen levels, not the absolute levels themselves, are associated with increased levels of pain. [8]
You can work to reduce any body pain you may be experiencing with these simple, easy steps:
At age 40 find a reliable, educated primary care provider familiar with recognizing and treating symptoms of perimenopause and menopause. The North American Menopause Society provides a list of menopause practitioners here.
If your pain is sudden, new, or extreme, make sure you tell your health-care provider as pain can have many causes beyond changing hormones. Track your pain, including where and when it happens and how intense the pain is, and communicate these to your healthcare provider.
There are multiple approaches to treating and managing chronic pain. The Practice Guidelines for Chronic Pain Management from the American Society of Anesthesiologists [13] recommend the following:
Multimodal interventions use more than one (= multi-) type (= modal) of therapy for the treatment of chronic pain. Multidisciplinary interventions are multimodal approaches that come from more than one field of study (e.g. psychological; surgical; pharmacological etc.) Research has shown that using multidisciplinary treatment programs can be effective in reducing the intensity of pain reported by patients for periods of time ranging from 4 months to 1 yr when compared to treatments from a single discipline.
During the menopausal transition, some women find that they experience pain – either new pain or more pain than usual – in different areas of their bodies. This pain is almost always neuropathic pain and it happens because lowered levels of estrogen are associated with chronic low-grade inflammation. Inflammation results in the buildup of fluid that pushes against nerve endings and results in neuropathic pain of various types (constant, throbbing, etc.) and severity. It appears that changes in estrogen levels, not the absolute levels themselves, are associated with increased levels of pain. [8]
[8] Dennis, C. Surging hormones blamed for pain. Nature (2005). https://doi.org/10.1038/news050822-6
Breast pain is common for many women as part of their menstrual cycles and it results from hormone activity. Estrogen and progesterone both increase during the second half (days 14 to 28) of a typical 28 day menstrual cycle. Estrogen causes the breast ducts to get larger and progesterone causes the milk glands to swell. This type of neuropathic pain can cause your breasts to feel painful, tender, and swollen.
The changing hormone levels during the menopausal transition alter your regular cycle and this in turn alters the effects of estrogen and progesterone on your breasts. While the pain itself may not be much different from your normal monthly episodes of breast tenderness, irregular menstrual cycles means that breast tissue is also affected at unpredictable times and for unpredictable durations. [3]
[3] https://www.webmd.com/menopause/guide/breasts-menopause
Many women experience joint and muscle pain and stiffness around the time of menopause, and in many cases this is pain that they haven’t experienced before. There are many causes of joint pain, and for mid-life women, hormones play a significant role. Estrogen helps to lower inflammation, so decreasing levels of estrogen during the menopausal transition are associated with increased levels of inflammation throughout your body. This inflammation can add to the existing pain caused by old joint and muscle injuries, wear and tear, and just plain aging or it can trigger pain in joints that haven’t hurt before. This is a type of neuropathic pain and can become chronic. [2]
[2] https://www.healthline.com/health/menopause/pain#changes
MYTH
We are absolutely done with this thinking at Herstasis. Pain is a sign that there is a problem and the first step is to talk to your health-care provider. If they don’t treat your pain with compassion and empathy, find another health-care provider. Together you can come up with a plan to identify the source of your pain and then you can determine the best course of action.
MYTH
No. No. No. No. Pain is a sign that something is wrong, listen to your body. Pain can be treated, but there is no way to start treatment if you do not acknowledge the pain in the first place and seek help. Talk to your health care provider about your pain, track it over time to see if it is coupled with any other symptoms, and start a treatment plan. There are many healthy ways to manage chronic pain including professional counseling, support group meetings, mindfulness training and breathing exercises, meditation, and the use of various medical therapies, devices and techniques.
MYTH
Not True! Changes in estrogen levels can impact the levels of inflammation throughout the body, which can then increase pain in multiple parts of the body. But pain is not normal, it is a signal that something is wrong. Talk to your healthcare provider about any changes to the levels of pain you are experiencing. If the underlying cause can be identified then treating the source of the pain is possible. Even if there is no clear cause, such as with fibromyalgia, your healthcare provider can help you find ways to manage the pain. Practicing self-care as outlined in the above material can also make a big difference.
MYSTERY
Research supports the fact there is a gender difference in the way pain systems function. Studies have found that there is a higher density of nerves in women that may cause a greater sensitivity to pain. The pain itself may be at a similar level but the perception of pain is different, with women perceiving more pain than men for similar stimuli. [12]
A fascinating study on pain and sex hormones looked at a unique study group – individuals undergoing sex-change procedures. One research trial showed that 30% of men who started taking female hormones began experiencing chronic pain during their treatment. When women started taking testosterone as part of their sex-change transition, more than half reported a reduction in their chronic pain. [8] The underlying processes around how sex hormones impact pain tolerance are poorly understood at the moment. Researchers propose that testosterone somehow reduces or blocks the pain signaling pathways in the central nervous system. Conversely, estrogen reverses this and stops any blockage of pain signals so pain sensitivity appears to increase. [8]
FALSE
This is not true. Sensing pain is subjective so it is highly variable amongst individuals. There is also a clear difference between how men and and women experience pain. Recent research has shown that male and female [mice!] differ in the neural pathways to sensing pain. Male mice that lack testosterone experience the ‘female’ path, and females that lack T cells (special cells involved in the usual female pain transmission path) or are pregnant switch to the pathway seen in male mice. More research is underway to understand this better. [11]
Yes, this is a normal symptom.
As estrogen declines during the perimenopausal transition, inflammation in your system develops because estrogen modulates your immune system and the biochemical signals that cause inflammation. You may notice you are developing osteoarthritis in some of your joints, and old joint injuries may begin to hurt and become stiff. As well, some women may experience an increase in their auto-immune disease symptoms.
To date, it isn’t known whether standard HT with estrogen is helpful for joint pain and inflammation. However it is known that joint inflammation can be reduced by regular moderate exercise including modified strength training. Low- impact exercises such as swimming and cycling are excellent at reducing pain and inflammation, promoting high quality sleep and they won’t damage your spine, knees and hips.
[1] Dubin, A. E., & Patapoutian, A. (2010). Nociceptors: the sensors of the pain pathway. The Journal of clinical investigation, 120(11), 3760–3772. https://doi.org/10.1172/JCI42843
[2] https://www.healthline.com/health/menopause/pain#changes
[2a] https://www.cdc.gov/arthritis/basics/fibromyalgia
[3] https://www.webmd.com/menopause/guide/breasts-menopause
[4] Chlebowski RT, Cirillo DJ, Eaton CB, Stefanick ML, Pettinger M, Carbone LD, Johnson KC, Simon MS, Woods NF, Wactawski-Wende J. Estrogen alone and joint symptoms in the Women’s Health Initiative randomized trial. Menopause. 2013 Jun;20(6):600-8. doi: 10.1097/GME.0b013e31828392c4. PMID: 23511705; PMCID: PMC3855295.
[4a] https://www.mayoclinic.org/diseases-conditions/vulvodynia/symptoms-causes/syc-20353423
[5] Chen, Q., Zhang, W., Sadana, N. et al. Estrogen receptors in pain modulation: cellular signaling. Biol Sex Differ 12, 22 (2021). https://doi.org/10.1186/s13293-021-00364-5
[6] Wiesenfeld-Hallin Z. Sex differences in pain perception. Gend Med. 2005 Sep;2(3):137-45. doi: 10.1016/s1550-8579(05)80042-7. PMID: 16290886.
[7] Singh, A., Asif, N., Singh, P. N., & Hossain, M. M. (2016). Motor Nerve Conduction Velocity In Postmenopausal Women with Peripheral Neuropathy. Journal of clinical and diagnostic research : JCDR, 10(12), CC13–CC16. https://doi.org/10.7860/JCDR/2016/23433.9004
[8] Dennis, C. Surging hormones blamed for pain. Nature (2005). https://doi.org/10.1038/news050822-6
[9] McCarthy, M., Raval, A.P. The peri-menopause in a woman’s life: a systemic inflammatory phase that enables later neurodegenerative disease. J Neuroinflammation 17, 317 (2020). https://doi.org/10.1186/s12974-020-01998-9
[10] https://www.menopause.org/for-women/sexual-health-menopause-online/sexual-problems-at-midlife.
[11] Why the sexes don’t feel pain the same way. Nature 567, 448-450 (2019). doi: https://doi.org/10.1038/d41586-019-00895-3
[12] American Society of Plastic Surgeons. “Study Reveals Reason Women Are More Sensitive To Pain Than Men.” ScienceDaily. ScienceDaily, 25 October 2005. www.sciencedaily.com/releases/2005/10/051025073319.htm
[13] Practice Guidelines for Chronic Pain Management: An Updated Report by the American Society of Anesthesiologists Task Force on Chronic Pain Management and the American Society of Regional Anesthesia and Pain Medicine. Anesthesiology 2010; 112:1–1
[14] https://www.practicalpainmanagement.com/how-can-botulinum-toxin-be-used-chronic-pain-syndromes
Original content, last updated February 22, 2023.
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