What Are the Signs That You Need Hormone Replacement Therapy?

Ashley Harwyn, PA-C, ABAAHP  |  Published December 29, 2025  |  Last updated October 6, 2026  |  19 min read

Hot flashes, vaginal dryness, early menopause, and bone loss are the recognized reasons to ask about hormones. Your history decides whether they are safe for you.

A sign tells you hormones might help; it does not tell you hormones are safe for you. This guide sorts the common signs into three groups: the ones the evidence supports treating with hormones, the ones that usually point somewhere else, and the ones that mean hormone therapy needs extra caution or is off the table. If you already know you want an evaluation, our bioidentical hormone therapy page explains how Ashley approaches it in Mount Pleasant and downtown Charleston.

• The FDA has approved hormone therapy for moderate to severe hot flashes, vaginal dryness and discomfort, and preventing bone loss. Those are the signs with the strongest evidence behind them.[2]
• “Bothersome” is the threshold. Frequent hot flashes lasted a median of 7.4 years in a large U.S. study, which means half the women in it had them for longer.[1][5]
• If dryness, pain with sex, or urinary changes are your only symptoms, low-dose vaginal estrogen is usually preferred over a systemic prescription.[1]
• Early or premature menopause, primary ovarian insufficiency, or ovaries removed early is its own reason: without contraindications, hormone therapy is recommended at least until about age 52.[1]
• Weight gain, preventing heart disease, and preventing dementia are not supported as reasons on their own, and the USPSTF recommends against hormones for preventing chronic conditions in women without symptoms.[1][7]
• The 2026 FDA label change removed heart disease, breast cancer, and probable dementia statements from the boxed warning, but the FDA did not ask companies to remove heart disease and breast cancer risks from the Warnings and Precautions section.[2][3]

Which signs actually count as a reason to consider hormone therapy?

Start with what the regulators and specialists agree on. The FDA says it has approved hormone therapies for moderate to severe hot flashes, for vaginal dryness and discomfort, and for preventing bone loss.[2] The Menopause Society adds a fourth group: women whose estrogen dropped too early because of primary ovarian insufficiency, surgical removal of both ovaries, or another cause of low ovarian function.[1] Those four are the uses these sources describe.

Other common concerns, from brain fog to belly fat, are not on that list of approved uses. The table below sorts several common signs by what they may point to and how the sources cited here treat them.

Read down the third column and the pattern is plain. The signs with a “yes” are hot flashes, genitourinary symptoms, early or surgical loss of estrogen, and bone loss prevention. The signs with a “no” are real concerns, but they are not approved uses of hormone therapy.

How bad do hot flashes have to be before hormones make sense?

There is no hot flash count that triggers a prescription. The Menopause Society frames the benefit around “bothersome” vasomotor symptoms, the clinical name for hot flashes and night sweats, and the FDA approval covers moderate to severe ones.[1][2] In plain terms, the question is whether they are bothersome. The position statement links hot flashes to poorer sleep, irritability, trouble concentrating, and lower quality of life.[1]

If night sweats wake you, mention it at your visit even if fatigue feels like the bigger problem, since poorer sleep is one of the effects the position statement describes.[1]

Duration matters too, because “just wait it out” is common advice. In the Study of Women's Health Across the Nation, which followed 1,449 women with frequent hot flashes, the median total duration was 7.4 years, with a median of 4.5 years after the final period.[5] Women whose symptoms began while they were still premenopausal or early in perimenopause had a median of more than 11.8 years, and African American women reported the longest median, 10.1 years.[5] Those are medians, so half the women in each group had symptoms for longer.

None of this makes hormones the only answer. The FDA has also approved three nonhormonal medicines for women who cannot or prefer not to take hormones.[3] And if you start hormone therapy and later stop, hot flashes come back in roughly half of women, so the plan should include how long you expect to stay on it and how you will reassess.[1] For a deeper look at the timeline itself, see our guide on how long hot flashes last.

What if dryness, pain with sex, or bladder changes are the main sign?

This group of symptoms has a name: the genitourinary syndrome of menopause, often shortened to GSM. It covers genital dryness, burning, and irritation, pain with sex, and urinary symptoms such as urgency, painful urination, and repeat urinary tract infections, all tied to the drop in estrogen.[1] The position statement ties GSM to menopause-related estrogen deficiency in the labia, vagina, urethra, and bladder, so it is worth raising whether or not you also have hot flashes.[1]

Here the evidence points to a smaller treatment, not a bigger one. For bothersome symptoms that over-the-counter moisturizers and lubricants do not relieve, in women who have no separate reason for systemic therapy, The Menopause Society recommends low-dose vaginal estrogen or other options such as vaginal DHEA or oral ospemifene.[1] ACOG makes the same distinction in patient terms: women who only have vaginal dryness may use local estrogen as a ring, tablet, or cream that releases small doses directly into the vaginal tissue.[6]

That matters because, as ACOG explains, systemic estrogen is released into the bloodstream, while local forms release small doses into the vaginal tissue.[6] The Menopause Society says low-dose vaginal estrogen has minimal systemic absorption and is preferred over systemic therapy when estrogen is used only for genitourinary symptoms.[1] We cover the safety questions in more depth in is vaginal estrogen safe.

Vaginal estrogen was also part of the 2026 FDA label update. The first six products with revised labels included topical vaginal estrogen alongside the systemic types.[2] If an old boxed warning is what put you off a vaginal product, the question is worth asking again.

Is early menopause or silent bone loss a sign you need it?

Yes. One can show up as a missing period, and the other may cause no symptoms at all.[8] Clinicians use the term primary ovarian insufficiency, or POI, when the ovaries stop working normally before age 40.[9] Irregular periods and reduced fertility occur before 40, sometimes as early as the teen years, and unlike menopause, a woman with POI may still have occasional periods and may still get pregnant.[9] Menopause before 40 is called premature, and menopause between 40 and 45 is called early.[1]

For these women the reasoning flips. In the absence of contraindications, The Menopause Society recommends hormone therapy at least until the average age of menopause, about 52, and says the results of the Women's Health Initiative trials in older women do not apply to them.[1] It lists the risks that women with POI and premature or early menopause may face, including fracture, heart disease, bone loss, mood and cognitive changes, and dementia.[1] For women who had both ovaries removed before the average age of menopause, it says estrogen therapy is indicated unless contraindications are present.[1]

Bone loss is the quieter sign. The NIH calls osteoporosis a “silent” disease because you typically have no symptoms and may not know you have it until you break a bone, and it notes that for many women it begins to develop a year or two before menopause.[8] Hormone therapy has been shown in double-blind randomized trials to prevent bone loss and, in the WHI, to reduce fractures in postmenopausal women without osteoporosis.[1] The fine print matters, though: the FDA indication is prevention, not treatment, and nonestrogen medicines are preferred for osteoporosis you already have.[1]

If a parent had osteoporosis or a hip fracture, bring it up, since the NIH lists that family history as a risk factor, along with low estrogen after menopause.[8] The NIH also lists quitting smoking among the steps that help prevent the disease and fractures.[8]

Which signs are not good reasons on their own?

Some reasons women ask about hormones are not supported as stand-alone uses. The clearest is prevention. The U.S. Preventive Services Task Force recommends against using estrogen with progestin, or estrogen alone after hysterectomy, to prevent chronic conditions such as heart disease in postmenopausal women without symptoms.[7] That recommendation is specific: it does not apply to women treating hot flashes or vaginal dryness, or to women with premature or surgical menopause.[7]

Memory is the second. The Menopause Society states that hormone therapy is not recommended at any age to prevent or treat a decline in thinking or dementia.[1] ACOG says something similar about the heart: combined hormone therapy should not be used solely to protect against heart disease.[6]