Black cohosh is a popular medicinal herb used historically to treat ailments and discomforts related to the female reproductive system. In modern naturopathy, black cohosh is used primarily as a treatment for perimenopausal and menopausal complaints, such as hot flashes, night sweats, sexual problems and mood disturbances. Although generally safe, black cohosh might contribute to discomfort in the legs and thighs. Consult your health care provider before using any medicinal herb.
Use During Perimenopause
Black cohosh, according to the University of Maryland Medical Center, may help to relieve psychological and physical effects associated with menopause, including anxiety, hot flashes, night sweats and vaginal dryness. Many perimenopausal and menopausal women turn to black cohosh as a low-risk, cost-effective, naturopathic alternative to hormone replacement therapy. However, evidence of its efficacy is mixed and inconclusive.
Leg Discomfort
A report by the National Institutes of Health's Office of Dietary Supplements suggests that leg discomfort is a common side effect associated with black cohosh use. Specifically, the NIH states that black cohosh can create a sensation of heaviness in the legs. This sensation may affect either the thighs or calves. It is unclear how or why this side effect occurs; it may relate to the hormonal or vascular effects of black cohosh on a perimenopausal woman's body.
Joint Pain
Black cohosh supplements can occasionally cause arthritis-like joint pain affecting the knees, according to the UMMC. This may radiate to the thighs, calves or even buttocks. If you have pre-existing joint pain, you should use black cohosh with caution and report any changes in symptoms to your primary health care provider. If your thigh pain becomes persistent, you may need to reduce your dose or stop using black cohosh.
Other Risks
The UMMC regards black cohosh as a generally safe herb, but it can cause several other risks besides thigh discomfort. The most common problems associated with black cohosh include abdominal pain, diarrhea, headaches, vertigo, nausea, changes in heart rate and weight gain --- these are most common in people taking high doses. More seriously, black cohosh can worsen hormone-sensitive conditions such as breast cancer, endometriosis and uterine fibroids. If you have a medical condition, it is critical that you consult a licensed health care provider before using any medicinal herb.
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