Hot Flashes from Cancer Treatment

What is Hot Flashes from Cancer Treatment?

Hot flashes from cancer treatment are episodes of sudden heat, flushing and sweating that begin when cancer therapy lowers sex hormone levels. They are a form of vasomotor symptom, the same family of symptoms as menopausal hot flashes, but they can be more severe and can affect women, men and younger people.^{[1, 2]}

Common symptoms

The typical hot flash is a wave of heat across the face, neck and chest, with sweating and skin flushing, sometimes followed by chills. At night the same events appear as night sweats.^[2]

• Disturbed sleep and daytime tiredness
• Changes in mood, sexual function and quality of life
• In some people, symptoms that overlap with fatigue or other treatment effects, which can make the cause hard to sort out^[1]

Causes and risk factors

Many cancer treatments reduce estrogen or testosterone, and that drop is what triggers vasomotor symptoms. Examples include chemotherapy that stops the ovaries, surgical removal of the ovaries, endocrine therapy for hormone receptor-positive breast cancer, and androgen deprivation therapy for prostate cancer.^{[2, 3]} Researchers link the symptoms to changes in the brain's temperature-control pathways in the hypothalamus.^[2]

Symptoms after cancer treatment can be more severe than at natural menopause, especially when the hormone drop is abrupt.^[1]

How it is diagnosed and treated conventionally

Hot flashes are recognized from the pattern of symptoms and the treatment history, and your oncology team decides whether other causes need to be ruled out.^[1] Menopausal hormone therapy is the most effective treatment, but it is generally avoided in hormone-sensitive cancers.^{[2, 4]}

Non-hormonal options with good evidence include cognitive-behavioral therapy, clinical hypnosis, certain antidepressants, gabapentin and a newer class of drugs that act on the brain's temperature-control pathway. These medicines can have side effects that limit their use.^{[2, 4]} In men on androgen deprivation therapy, oxybutynin and antidepressants have been used, and acupuncture and cognitive-behavioral therapy may have a role.^[3]

Why Hot Flashes from Cancer Treatment calls for a whole-person approach

Hot flashes are not only a nuisance. They can disrupt sleep and quality of life, and they can make it harder for people to keep taking treatment such as endocrine therapy.^[2] A plan that addresses several contributors at once is therefore reasonable, with your oncology team guiding the cancer treatment itself.

The sections below describe factors that interact with hot flashes. Complementary care can address some of them, but it cannot change the underlying hormone effects of your cancer therapy.

Hormone drop and temperature control

The trigger is a fall in sex hormones, and the symptoms are tied to the hypothalamic pathway that controls body temperature.^[2] Newer drugs that act on that pathway are being studied for this reason.^[2]

Sleep

Night sweats disrupt sleep, and poor sleep makes the day harder. In a small trial of 58 breast cancer survivors with daily hot flashes, electroacupuncture improved sleep quality about as well as gabapentin over 8 weeks.^[5]

Mood, stress and quality of life

Menopausal symptoms after cancer extend beyond hot flashes to include sleep, mood and quality of life.^[1] Mind-body approaches such as cognitive-behavioral therapy and hypnosis have good-quality evidence for vasomotor symptoms, and they are worth discussing with your care team alongside any complementary care.^[4]

Staying on cancer treatment

Hot flashes are linked with reduced tolerability of and adherence to cancer treatment.^[2] If symptoms are making you consider stopping a cancer medicine, talk to your oncologist first. Do not stop on your own.

Acupuncture for Hot Flashes from Cancer Treatment

What the research shows

Acupuncture has been studied in several randomized trials, and the results are mixed. Most trials involve women with breast cancer. A systematic review of eight randomized trials in cancer patients found that every study showed improvement in the true acupuncture groups, but only a few showed a clear advantage over sham acupuncture, and none had a low risk of bias. The authors judged the evidence insufficient to support or refute benefit.^[6]

More recent trials are somewhat more encouraging. In a trial of 120 breast cancer survivors, electroacupuncture, sham acupuncture, gabapentin and placebo pills were compared over 8 weeks. Hot flash scores fell most with electroacupuncture, then sham acupuncture, gabapentin and placebo pills. The authors called the findings preliminary and noted that the pill groups had more adverse events.^[7]

An Italian trial of 190 women found that 10 acupuncture sessions plus enhanced self-care lowered hot flash scores more than self-care alone, with benefit still present 6 months later. Because there was no sham control, expectation may have played a part.^[8] A pooled analysis of three trials in the United States, China and South Korea (158 women) found that 20 sessions over 10 weeks improved hot flash scores and endocrine symptoms compared with delayed treatment, although the effect differed by site.^[9] A 2025 meta-analysis of 11 trials (963 women) found lower hot flash symptom scores with acupuncture but no clear reduction in how often hot flashes occurred, and it rated the evidence as low certainty with a high risk of bias.^[10] The 2023 North American Menopause Society statement, which covers menopausal hot flashes in general rather than cancer specifically, did not recommend acupuncture and rated the evidence as limited or inconsistent.^[4]

In prostate cancer, evidence is much thinner. A pilot study of 22 men on androgen deprivation therapy reported that about 4 in 10 had at least a 50 percent drop in hot flash score after 4 weeks, but it had no control group.^[11]

How acupuncture may work

How acupuncture might reduce hot flashes is not settled. In a small trial of 24 breast cancer patients, 5 weeks of acupuncture improved hot flash scores and changed brain connectivity on functional MRI, but without a sham group this cannot show that the needling itself caused the change.^[12] The sham-versus-placebo-pill difference in the electroacupuncture trial also suggests that the ritual and expectation of a procedure contribute to the response.^[7]

What treatment involves

Sessions use fine, sterile, single-use needles placed at points chosen for the person, typically for about 20 to 40 minutes. Some practitioners add mild electrical stimulation. The trials above gave treatment over 8 to 12 weeks, with 10 to 20 sessions where the number was reported, and we reassess after a short course of visits.^{[7, 8, 9]}

Serious problems from acupuncture are rare. In prospective studies, about 9 in 100 patients had at least one adverse event, about half of which were bleeding, pain or redness at a needle site, and serious events occurred in about 1 in 10,000 patients.^[13] Tell the practitioner first if you have a low blood count, a bleeding disorder, take blood thinners, have lymphedema in an arm (needling in that arm is usually avoided), are pregnant, or have a pacemaker (relevant to electroacupuncture).

Ayurvedic medicine for Hot Flashes from Cancer Treatment

The Ayurvedic view

In Ayurveda, hot flashes are generally described as an excess of Pitta, the principle associated with heat and transformation, sometimes with depleted tissues after a long illness or treatment. This is a traditional framework used to choose therapies, not a biomedical diagnosis.

Therapies that may be used

Care is chosen for the individual and traditionally combines:

• Diet and daily routine aimed at reducing heat, such as cooling foods, avoiding very spicy or fried meals, and regular sleep
• Stress-reducing practices such as gentle breathing and relaxation
• Herbs traditionally used in women's health, such as shatavari (Asparagus racemosus) and ashwagandha (Withania somnifera), prescribed individually

Panchakarma is not appropriate during active chemotherapy or radiation, with low blood counts, in frailty, in pregnancy or in acute illness, and it should only be considered with your oncologist's agreement.

What the research shows

There are no clinical trials of Ayurvedic treatment for hot flashes caused by cancer treatment. A PubMed search for Ayurveda, Panchakarma and these herbs combined with cancer-related hot flashes found none, so the evidence for this condition is none.

Some small trials in women with natural menopause exist. A 70-person trial of a shatavari root extract reported fewer hot flashes and night sweats than placebo, and the authors called for larger studies.^[14] An 8-week placebo-controlled trial of an ashwagandha root extract in 100 perimenopausal women found improvement in menopausal symptom scores, but it also found a rise in blood estradiol.^[15] Neither trial included cancer patients, and a hormone effect matters in hormone-sensitive cancers, so these findings cannot be applied to you without your oncologist's input.

Herbal medicine for Hot Flashes from Cancer Treatment

Herbs and formulas that have been studied

Chinese herbal formulas chosen by pattern, and black cohosh (Actaea or Cimicifuga racemosa), have been studied for hot flashes and menopause-like symptoms. Both have been reviewed in women with or at risk of breast cancer.^{[16, 17]}

What the research shows

The evidence is limited and mixed. A meta-analysis of 42 studies in 3,112 breast cancer survivors found lower menopausal symptom and hot flash scores with traditional Chinese medicine (not only herbs) than with control treatment, and no difference in estradiol or FSH levels; but results like these depend on the quality of the included studies, which was not uniform.^[16] A Cochrane review of 22 trials in women with natural menopause found insufficient evidence that Chinese herbal medicine reduced hot flushes more than placebo, with very low to moderate quality evidence.^[18]

For black cohosh, a systematic review of 26 studies in women with or at risk of breast cancer found that benefit for hot flashes appeared against baseline but not against placebo, concluded that evidence for efficacy in breast cancer patients is lacking, and found no association with increased breast cancer risk.^[17] The 2023 North American Menopause Society statement did not recommend supplements or herbal remedies for vasomotor symptoms.^[4]

Safety and herb-drug interactions

Herbs are active substances. Reviews describe interactions with blood thinners, antidepressants and other medicines. St John's wort, for example, has been reported to cause serotonin syndrome with SSRIs, and some herbs increase bleeding risk with warfarin or aspirin.^[19] Because antidepressants are sometimes used for hot flashes, and because some herbs have hormone-like activity, every herb should be reviewed with your oncologist. In one study, about one fifth of Ayurvedic medicines bought online contained detectable lead, mercury or arsenic.^[20] Use only tested products prescribed individually by a practitioner. Tell us if you are pregnant or breastfeeding, have liver or kidney disease, are on chemotherapy, immunotherapy or targeted therapy, or have surgery planned.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine often describes hot flashes as yin deficiency with rising heat, a picture that loosely parallels the falling hormone levels described in the research.^[2] Acupuncture research looks at effects on brain networks, though findings are early.^[12]

Ayurveda's aggravated Pitta describes heat, sweating and irritability. No study has shown that a dosha or a yin-deficiency pattern corresponds to a specific biological process.

How this care fits with your medical care

Integrative care is complementary. Keep your oncology team and do not stop or change cancer treatment, endocrine therapy or any prescribed medicine without your prescriber. For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care. We do not manage the cancer or prescribe medicines.

Please bring your cancer diagnosis and current treatment plan, a full list of medicines and supplements, recent blood counts if you have them, and notes on when your hot flashes occur.

When to seek urgent medical care

Hot flashes are usually not dangerous, but some symptoms during cancer treatment need prompt evaluation.

• Fever of 100.4 degrees F or higher during chemotherapy, which can signal infection
• Drenching night sweats with unexplained weight loss, which should be reported to your oncology team
• Chest pain, a racing or irregular heartbeat, or trouble breathing
• Fainting or severe dizziness
• Sudden severe headache, confusion or weakness on one side of the body
• Thoughts of ending your life, in which case call or text 988

For emergencies, call 911 or go to the nearest emergency department.