Overview
Causes
Treatments
        Sweats
        Hot flashes
General Treatments to Relieve Symptoms

Overview

Sweat is made by sweat glands in the skin. Sweating helps to keep the body cool and can occur with disease or fever, when in a warm environment, exercising, or as part of hot flashes experienced with menopause. Most breast cancer and prostate cancer patients report having moderate-to-severe hot flashes. Distressing hot flashes seem to be less frequent and gradually decrease with time in most postmenopausal women who do not have breast cancer. Hot flashes occur in most men with prostate cancer who have had surgery to remove the testicles or who receive drugs to stop the testicles from making testosterone.

Sweats in the cancer patient may be associated with the tumor, cancer treatment, or other medical conditions that are not related to the cancer. Sweats are a typical symptom of certain types of tumors such as Hodgkin lymphoma, pheochromocytoma, or tumors involving the nervous system and endocrine system. Sweats may also be caused by:

• Fever.



• Female menopause (natural menopause, surgical removal of the ovaries, or damage to ovaries from chemotherapy, radiation, or hormone therapy).



• Male menopause (surgical removal of the testicles or hormone therapy).



• Drugs such as tamoxifen, aromatase inhibitors, opioids, antidepressants, and steroids.



• Problems in the hypothalamus in the brain.



• Sweating disorders.

Treatment of sweats caused by fever is directed at the underlying cause of the fever. (Refer to the fever Treatment section for more information.) Sweats caused by a tumor are usually controlled by treatment of the tumor.

Hot flashes associated with natural or treatment-related menopause can be effectively controlled with estrogen replacement. Many women are not able to take estrogen replacement (for example, women with breast cancer). Hormone replacement therapy that combines estrogen with progestin may increase the risk of breast cancer or breast cancer recurrence.

Studies of non-estrogen drugs to treat hot flashes have reported that many of them are not as effective as estrogen replacement or have unwanted side effects. The most effective of these include megestrol (a drug similar to progesterone) and certain antidepressants, including venlafaxine. It is important to know that some antidepressants may change how other drugs, such as tamoxifen, work in the body. Soy and black cohosh have not proven to be helpful in relieving hot flashes. Soy contains estrogen-like substances; the effect of soy on the risk of breast cancer growth or recurrence is not clear.

Relaxation training has been found to decrease hot flash discomfort in postmenopausal women who are in general good health.

Treatment of hot flashes in men may include estrogens, progesterone, antidepressants, and anticonvulsants. Certain hormones (such as estrogen) can make some cancers grow. The effect of hormone use on the growth of prostate cancer is being studied.

A variety of other medications are being used for general treatment of cancer-related sweats. The use of loose-fitting cotton clothing, fans, and behavioral techniques such as relaxation training is also recommended.

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