Hypoestrogenism
1 medicine
Hypoestrogenism is a state of abnormally low oestrogen that causes hot flushes, vaginal dryness and bone loss, most often around menopause. It is usually treated with oestrogen replacement.
Key facts
- Hypoestrogenism means the body produces less oestrogen than it needs, most often around menopause but also after surgical removal of the ovaries, certain cancer treatments, or premature ovarian insufficiency.
- Hot flushes and night sweats are the most recognised signs; vaginal dryness, reduced libido and mood shifts are common but less often discussed.
- Over time, low oestrogen speeds up bone loss and can affect cardiovascular health, skin and concentration.
- The main treatment is hormone replacement with estradiol, the main oestrogen the ovaries produce.
What causes it
Menopause, the natural decline in ovarian function with age, is the most common cause, but oestrogen can also fall after surgical removal of the ovaries, during and after certain cancer treatments such as chemotherapy or pelvic radiotherapy, or in premature ovarian insufficiency, where the ovaries stop working normally before age 40. Breastfeeding and some hormonal contraceptives can also lower circulating oestrogen temporarily. Whatever the cause, the pattern of symptoms that follows is largely the same.
What low oestrogen feels like
Hot flushes and night sweats are the most recognised signs. Vaginal dryness, reduced libido and mood shifts are common but less frequently discussed, and many women do not connect them to oestrogen at all. Over time, low oestrogen accelerates bone loss, raising fracture risk, and can affect cardiovascular health. Skin thinning, joint aches and difficulty concentrating are also reported, and sleep quality often suffers alongside the night sweats.
Replacing what the body has lost
The main approach to treating symptomatic hypoestrogenism is hormone replacement, most often using estradiol, the main oestrogen the ovaries produce. This sits within the broader women's health field of care. Estradiol is available as tablets, skin patches, gels and vaginal preparations, and a doctor matches the route to the dominant symptom: vaginal dryness alone often responds well to a local, low-dose option, while hot flushes and bone protection usually call for a systemic dose. The choice of formulation depends on symptom severity, personal and family history, and how long treatment is expected to continue.
When to see a doctor
Speak with a doctor if you are experiencing sudden or severe symptoms rather than managing them alone, and before starting hormone replacement, since personal and family history, including any history of blood clots or hormone-sensitive cancer, affect whether it is suitable for you.
This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.