Yes, both can be linked to gynaecomastia. Anabolic steroids raise hormone levels, and some of the excess testosterone is converted into oestrogen, which stimulates male breast tissue. Some prescription hair-loss tablets work by blocking the conversion of testosterone to a more potent hormone, which can shift hormone balance and has been associated with breast tenderness and enlargement in a minority of men. Early changes may settle if the cause is stopped under medical advice, but established tissue often needs surgery.
How hormones drive breast tissue growth
Men and women both have oestrogen and testosterone, just in different amounts. Male breast tissue is sensitive to the balance between them. When oestrogen activity rises relative to testosterone, the small amount of breast gland behind the nipple can grow. This is why gynaecomastia is common in puberty, in later life as testosterone declines, and whenever outside substances disturb the hormonal system.
Anabolic steroids
Anabolic steroids and related performance and image-enhancing drugs are taken to build muscle. High doses of testosterone and similar compounds are partly converted in the body into oestrogen by an enzyme called aromatase. The body also responds by reducing its own testosterone production, and when a cycle ends, natural levels may take time to recover, leaving a period in which oestrogen dominates. Both processes can stimulate breast tissue. Tenderness or a lump behind the nipple is often the first sign. Some other bodybuilding supplements have also been linked to gynaecomastia. Supplying anabolic steroids for non-medical use is illegal, and they carry wider health risks, including effects on the heart, liver, fertility and mood.
Prescription hair-loss tablets
Some tablets used for male pattern hair loss, and also for prostate enlargement, work by blocking an enzyme called 5-alpha reductase. This reduces the conversion of testosterone to dihydrotestosterone (DHT), which slows hair loss at the scalp. As a knock-on effect, hormone balance shifts, and a small number of men develop breast tenderness or enlargement. Anyone who notices breast changes while taking this type of medicine should speak to the prescriber. Any breast lump, pain, nipple discharge or change should be reported promptly, and treatment should not be stopped or changed without medical advice.
Other substances to be aware of
- Alcohol: heavy drinking can affect liver function and hormone balance.
- Cannabis: has been associated with gynaecomastia in some men.
- Other prescribed medicines: a range of treatments for heart, stomach, prostate and mental health conditions can have this effect; your GP or pharmacist can advise.
- Some herbal and ‘natural’ products: including certain oils and supplements with hormone-like effects.
What to do if you notice changes
See your GP. Be open about any steroid, supplement or medication use, as this helps identify the cause and plan tests. Your GP may review your medicines, check hormone levels and liver function, and examine the testicles. If the swelling is recent, removing the trigger may allow it to reduce. A hard, fixed or one-sided lump, nipple discharge or skin changes should always be assessed promptly.
When surgery is appropriate
Gynaecomastia that has been present for more than a year usually becomes firm and fibrous and is unlikely to go away on its own. For men who have stopped steroids or reviewed their medication and still have persistent tissue, surgery is the most reliable option. It typically involves removal of the gland through a small incision at the edge of the areola, often combined with liposuction. Mr Nassab will advise stopping anabolic steroids well before surgery, as continued use increases bleeding risk and the chance of new tissue forming afterwards.
Protecting your result
After surgery, restarting steroids or similar substances can stimulate any remaining breast tissue and cause new fullness. Maintaining a stable weight and reviewing any new medicines with your GP also helps. Gynaecomastia surgery costs from £9,500 and the £150 consultation fee is charged separately. Surgery is for men aged 18 and over.
Frequently Asked Questions
How quickly can steroids cause gynaecomastia?
Tenderness or a small lump can appear during or shortly after a cycle, but timing varies widely between individuals.
Will gynaecomastia go away after stopping hair-loss tablets?
Early changes sometimes improve after stopping under medical advice, but tissue present for a longer period may persist.
Is surgery possible for men who have used steroids?
Yes, once steroid use has stopped and hormones have had time to settle. Continuing use increases complications and recurrence risk.
Should the GP be told about steroid use?
Yes. Honest information helps your GP find the cause, choose the right tests and keep you safe; conversations are confidential.
How long after stopping steroids should surgery wait?
There is no single rule, but time is needed for hormones to settle and the tissue to stabilise. Mr Nassab will advise on timing based on your history and examination.
