Sudden menopause after breast cancer treatment

For women who have not yet reached menopause, breast cancer treatment can bring on menopause suddenly rather than gradually. Chemotherapy can damage the ovaries, causing periods to stop within weeks or months. Ovarian suppression injections switch off the ovaries while they are given. Surgery to remove the ovaries, often recommended for women with BRCA mutations, causes immediate menopause. Hormone therapy medicines can also cause menopause-like symptoms even when periods continue. Because natural menopause usually unfolds over several years, the body has time to adjust. When menopause happens abruptly, symptoms are often stronger and harder to cope with. Common symptoms include intense hot flushes and night sweats, poor sleep, vaginal dryness and pain during sex, lower desire, mood swings, anxiety or low mood, joint aches, difficulty concentrating, weight changes and dry skin. Longer term, early loss of oestrogen can thin bones and affect heart health. Because hormone replacement therapy is usually avoided after breast cancer, especially hormone-sensitive cancer, management focuses on lifestyle changes, non-hormonal medicines, psychological approaches such as cognitive behavioural therapy, vaginal moisturisers, pelvic floor physiotherapy and protecting bone and heart health. Many women find that symptoms become more manageable over time with the right support.

You are not imagining it

Sudden menopause symptoms can be very intense, especially for younger women.

Help is available

Tell your team about symptoms, as many can be eased.

Plan for long-term health

Bone and heart checks are important after early menopause.

Early menopause increases long-term health risks, which can be reduced.

Bone density scans

A baseline scan helps monitor bone health, especially on aromatase inhibitors.

Calcium and vitamin D

Include calcium-rich foods and take vitamin D if advised.

Weight-bearing exercise

Walking, stair climbing and strength training help keep bones strong.

Heart checks

Have blood pressure, cholesterol and blood sugar checked regularly.

Bone medicines

Your doctor may suggest bone-strengthening medicines if bones thin.

When lifestyle changes are not enough, several treatments can help. Your oncologist will consider your cancer, other medicines and overall health before recommending any of them.

Certain antidepressants

Some antidepressants in low doses can reduce the number and intensity of hot flushes, even in women who are not depressed. Some of these can interact with certain hormone therapies, so your team will choose carefully.

Nerve pain medicines

Some medicines used for nerve pain can reduce night sweats and improve sleep, and may suit women whose symptoms are worst at night.

Blood pressure medicines

A few blood pressure medicines have a modest effect on hot flushes, but side effects can limit their use.

Cognitive behavioural therapy

CBT helps change how you respond to hot flushes and night sweats, reducing their impact on daily life and sleep. It has good research support and no medicine side effects.

Newer non-hormonal medicines

Medicines that act on temperature control centres in the brain have been developed for hot flushes. Availability and suitability after breast cancer should be discussed with your oncologist.

Acupuncture

Some women find acupuncture helpful, though evidence is mixed. Choose a qualified practitioner and avoid needles in an arm at risk of lymphedema.