Hot 
        Flashes, Sweats, Heat Intolerance and Chills:
        The hot flash or the more descriptive term the hot flush is the symptom 
        commonly associated with menopause. Many people are under the impression 
        that hot flushes are the only significant manifestation of menopause, 
        other than the cessation of regular menstrual cycles. When you here someone 
        say, "I’ve gone through menopause", or "I can’t 
        wait until I’m done with menopause", it is likely that they 
        equate no longer having flushes as a sign that they have "gone through" 
        menopause. However, no one "goes through" menopause. Once you 
        become hormonally deficient you remain so for the rest of your life.
About 75% of women 
          experience hot flushes, heat intolerance or sweats sometime during or 
          prior to their menopause. Although these symptoms resolve within two 
          years in most of those affected, they may last five years or more in 
          approximately 20% of women. I have had patients in their 80’s 
          in whom these symptoms persisted. Some patients experience chills in 
          a similar fashion to the hot flush and it is likely a variant of the 
          same phenomenon.
        The hot flush can 
          range from a barely perceptible feeling of warmth to intense heat of 
          the chest, neck and head and can be accompanied by profuse flushing 
          and sweats. Many women develop chronic heat intolerance in lieu of or 
          in addition to flushing. They will often wear light clothing in the 
          middle of the winter and prefer to set the thermostat in their homes 
          at a level that is noticeably cool for the rest of their family. One 
          patient told me that in the middle of the winter she would stand in 
          her unheated garage several times a day as it was the only place she 
          could find at least temporary relief for her discomfort. These patients 
          are very uncomfortable in warm weather and many have told me that vacationing 
          in a tropical climate was out of the question for them.
        Mild flushing episodes 
          can often be ignored but as they progress in intensity they can become 
          annoying, distracting, embarrassing and in the worst case scenarios 
          debilitating. Menopausal women often know when the flush is about to 
          begin before they are aware of any sense of heat or flushing. Usually, 
          women who have undergone ovarian removal experience the most severe 
          symptoms and there may be associated nausea, urinary urgency or an impending 
          sense of doom. The flushes can last from several seconds to as long 
          as thirty minutes and sometimes as long as an hour and can occur from 
          rarely to every ten to thirty minutes. They tend to be more frequent 
          and severe during the night and often disturb sleep. Associated sweats 
          may be so severe as to necessitate a change of sleepwear.
        Women experiencing 
          severe flushes may be unable to work and have difficulty performing 
          the routine activities of daily living. A menopausal woman who is delivering 
          a business presentation and has a severe flushing episode may find it 
          difficult if not impossible to continue. Stressful situations, warm 
          temperatures, alcohol, hot food, warm clothing and exercise are frequently 
          precipitating factors. A menopausal woman’s difficulty with flushes 
          tends to be taken lightly by those never having experienced the symptom, 
          including other women. One will sometimes hear the phrase, "get 
          over it", spoken by people insensitive to how disturbing and unpleasant 
          a flushing episode can be.
        There is a story 
          which appeared in a national news magazine a few years ago written by 
          a woman who had recently become menopausal. In the article she describes 
          how she felt during a flushing episode on a cold winter day while walking 
          in a large northeastern city. Despite the cool weather and her open 
          coat she was in considerable discomfort. Sweating profusely, she thought, 
          "I’m sorry mom!", as she remembered how years before 
          she had lightly dismissed her mother’s readily apparent distress 
          with similar flushes. The woman was remorseful for her failure to have 
          been more supportive. Hot flushes, often the butt of jokes about menopause, 
          may not be amusing to a menopausal woman whose quality of life is affected 
          by them.
        What causes 
          hot flushes, sweats and heat intolerance?
        These symptoms occur 
          as a response to changing hormone levels which induce confusion (doctors 
          refer to this as "vasomotor instability") in the temperature 
          regulating mechanism of the body. Your body "thermostat", 
          located in an area of the brain called the hypothalamus", is intermittently 
          fooled into believing that your body temperature should be lower. To 
          accomplish this the "thermostat" sends signals that cause 
          warm blood located in the core of your body to be brought to dilated 
          blood vessels in the surface of your skin where it can be cooled by 
          the surrounding air. The "sweats" some women experience is 
          a more extreme cooling measure. Evaporation of liquid in the form of 
          perspiration from the skin is utilized to reduce body temperature. If 
          you recall how chilled you feel when you get out of a swimming pool 
          or a bath, you can see how effective evaporation is as a cooling mechanism.
        Is there 
          a treatment for hot flashes, sweats and heat intolerance?
        Hormone replacement 
          therapy, using estrogen and if needed testosterone, is the most effective 
          treatment. All the regimens of HRT in routine usage today will relieve 
          the majority of menopausal women of these symptoms. Whichever regimen 
          is used, must be taken on a regularly basis for as long as a month to 
          resolve symptoms. If a program does not prove to be effective, a slightly 
          higher dose of the same preparation can be tried and if this is not 
          successful one of the other routes of administration should be given 
          a trial. I have found that changing preparations that are administered 
          using the same route of administration is not as effective in relieving 
          resistant symptoms as changing to a preparation that utilizes an alternate 
          route of administration.
        The treatment program 
          that is almost always successful even if symptoms have been longstanding 
          and resistant to other methods of hormone replacement is subcutaneous 
          implantation of the appropriate dose of estradiol and, if indicated, 
          testosterone. I have seen patients who had symptoms for as long as thirty 
          years or more in spite of various types of HRT treatment, whose symptoms 
          resolved with this route of administration. One of these patients was 
          in her early 80’s and had experienced flushes and sweats from 
          the time of her hysterectomy around age 40. Another told me that until 
          she had the subcutaneous implantation she had slept in a chair for over 
          20 years, as she was too uncomfortable sleeping in a bed.
        Although not as 
          effective, patients who cannot or prefer not to take estrogen may be 
          treated with progesterone. Historically Provera, (medroxyprogesterone 
          acetate) and Megace, (megestrol acetate) have been used for this purpose.
        For a more 
          in depth information about hormone replacement therapy, look at the 
          About Hormone Replacement Therapy, Methods of Hrt and Regimens sections 
          of the web site.
        Some women are more 
          comfortable with treatments they are able to obtain themselves without 
          a prescription at a drug store, health food store, or from a herbalist. 
          These therapies are sometimes used as complementary therapies along 
          with prescription treatments. Non prescription therapies are advertised 
          widely and are available at the local pharmacy. One of the most popular 
          is vitamin E taken in a dosage of up to 400 IU daily. Natural and alternative 
          therapies include foods containing plant estrogens called phytoestrogens 
          and herbal remedies. Soy is an excellent source of phytoestrogen and 
          a daily intake of soy products may be helpful. Herbal remedies that 
          are reputed to have estrogenic activity include Dong quai, Ginseng, 
          and Gotu kola. Unfortunately, there has not been enough research in 
          this area and much needs to be done to establish proper dosage, safety 
          and efficacy. Although some women may find that some of their symptoms 
          are alleviated by these therapies, there is no evidence at present that 
          they prevent long-term consequences of lowered hormone levels.
        
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          This page defines and discusses menopause, surgical menopause and 
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          One of the concerns shared by women of menopausal age is the possibility 
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