Fatigue, brain fog, weight changes, disrupted sleep, mood changes and thinning hair are common reasons women seek help during midlife. The difficulty is that these symptoms can occur with perimenopause, thyroid dysfunction and several other medical conditions.
Sometimes the answer is not one or the other. Perimenopause and thyroid disease can occur at the same time, and each deserves an appropriate evaluation.
Why the symptoms can be confusing
During perimenopause, estrogen and progesterone fluctuate as the ovaries gradually transition toward menopause. Symptoms may begin while periods are still regular and can change considerably from month to month.
The thyroid regulates metabolism, temperature, heart rate, energy and many other functions. When it produces too little or too much thyroid hormone, the resulting symptoms may resemble those attributed to menopause.
Symptoms that may occur with either condition include:
Fatigue or reduced stamina
Brain fog or difficulty concentrating
Changes in mood or anxiety
Sleep disruption
Changes in weight
Hair or skin changes
Menstrual irregularity
Palpitations
Changes in libido
Because of this overlap, symptoms alone cannot always identify the cause.
Clues that may point toward perimenopause
Changes in the timing or flow of menstrual periods are often an early sign of perimenopause. Hot flashes, night sweats, vaginal dryness, pain with intimacy and new urinary symptoms may also make the menopausal transition more likely.
Perimenopause is usually identified from a woman’s age, symptoms and menstrual history. A single estradiol or FSH result may be difficult to interpret because reproductive hormone levels can fluctuate significantly during this stage.
This does not mean testing is never useful. Laboratory evaluation may be appropriate when symptoms occur unusually early, the diagnosis is unclear or another medical condition needs to be considered.
Clues that may suggest a thyroid condition
An underactive thyroid, or hypothyroidism, may cause persistent fatigue, cold intolerance, constipation, dry skin, hair changes, slowed thinking and weight gain.
An overactive thyroid, or hyperthyroidism, may cause heat intolerance, increased sweating, tremor, anxiety, palpitations, insomnia, more frequent bowel movements or unintentional weight loss.
These patterns are helpful clues, but they are not diagnostic. Some people with thyroid disease have subtle symptoms, while many common thyroid symptoms can also arise from iron deficiency, inadequate sleep, medication effects, depression or other conditions.
What testing may be helpful?
Unlike typical perimenopause, thyroid dysfunction can usually be evaluated with blood testing. Testing commonly begins with thyroid-stimulating hormone, or TSH, and free T4. T3 testing or thyroid-antibody testing may be useful in selected circumstances.
Results still need clinical interpretation. A laboratory value should be reviewed alongside symptoms, medications, supplement use, pregnancy plans and previous thyroid history.
A careful evaluation may also consider blood counts, iron status, metabolic health or nutritional concerns when clinically appropriate.
Could both conditions need treatment?
Yes. Correcting thyroid dysfunction will not necessarily resolve hot flashes, vaginal symptoms or other effects of menopause. Likewise, menopause hormone therapy does not treat an underlying thyroid disorder.
Treatment should address the conditions actually present. Depending on the findings, a plan may include thyroid medication, hormonal or nonhormonal menopause treatment, nutrition and lifestyle guidance, or coordination with another clinician.
Full Spectrum Health & Wellness provides individualized thyroid and menopause care by telemedicine throughout Idaho and Washington. Learn more about thyroid evaluation, explore perimenopause and menopause care, or schedule a complimentary introductory call.
