Gynaecomastia — the benign enlargement of glandular breast tissue in males — is more common than many men realise, yet knowing how to fix gynaecomastia and where to turn for help can feel overwhelming. Whether caused by hormonal changes, medication, an underlying health condition, or lifestyle factors, the condition affects men of all ages and can significantly impact self-confidence and quality of life. This article explains the causes of gynaecomastia, when to seek medical advice, and the full range of treatment options available in the UK — from watchful waiting and specialist-led medicines to surgery and supportive lifestyle changes.

What Is Gynaecomastia and Why Does It Develop?

Gynaecomastia develops due to an imbalance between oestrogen and androgen activity in breast tissue, and can be triggered by puberty, medications, medical conditions such as hypogonadism or liver disease, recreational substances, or obesity.

Gynaecomastia refers to the benign enlargement of glandular breast tissue in males, resulting in a firm or rubbery swelling beneath one or both nipples. It is distinct from pseudogynaecomastia, which involves fatty tissue accumulation without true glandular growth, though the two conditions can coexist. Gynaecomastia is common, affecting an estimated 30–60% of males at some point during their lifetime, with peaks occurring during three key life stages: infancy, puberty, and older adulthood.

The underlying cause is typically an imbalance between oestrogen and androgen activity in breast tissue. Oestrogen stimulates glandular growth, whilst testosterone normally counteracts this effect. When this hormonal equilibrium is disrupted — whether through physiological changes, medication use, or an underlying health condition — breast tissue may begin to proliferate.

Common contributing factors include:

• Puberty: Transient hormonal fluctuations affect up to 70% of adolescent males and usually resolve within one to two years without intervention.

• Medications: Several drug classes are associated with gynaecomastia, including spironolactone, cimetidine, anti-androgens (e.g., bicalutamide), 5-alpha-reductase inhibitors (e.g., finasteride, dutasteride), oestrogens, opioids, ketoconazole, GnRH analogues, anabolic steroids, some antipsychotics, and certain antiretrovirals (including efavirenz). If you suspect a medicine may be contributing, do not stop taking it without first speaking to your GP or specialist. Suspected side effects from medicines can be reported via the MHRA Yellow Card scheme.

• Medical conditions: Hypogonadism, hyperthyroidism, liver cirrhosis, chronic kidney disease, Klinefelter syndrome, testicular tumours, and hCG-secreting germ cell tumours can all alter hormone metabolism. Obesity is also an important driver, as adipose tissue converts androgens to oestrogens through peripheral aromatisation.

• Recreational substances: Heavy or chronic alcohol use and anabolic steroids are well-recognised causes. Cannabis has been reported in some observational studies, though the evidence is inconsistent and not definitive.

In many cases, no specific cause is identified — a presentation termed idiopathic gynaecomastia. Understanding the likely aetiology is essential before deciding how to address the condition, as treatment approaches differ considerably depending on the root cause.

When to See a GP About Enlarged Breast Tissue

See a GP promptly for any new, persistent, or unilateral breast lump, nipple discharge, or skin changes; NICE NG12 recommends an urgent two-week referral for unexplained breast lumps in those aged 30 and over.

Many men feel embarrassed about breast changes and delay seeking medical advice, yet a timely GP assessment is important to rule out serious underlying causes. You should arrange an appointment if you notice:

• A new, firm lump beneath one or both nipples that persists beyond a few weeks

• Unilateral swelling (affecting only one side), which warrants more urgent investigation

• Nipple discharge, particularly if bloodstained

• Nipple retraction or other nipple changes

• Skin changes such as dimpling, puckering, or ulceration

• Axillary lymphadenopathy (swollen lymph nodes in the armpit)

• A rapidly enlarging mass

• Associated symptoms including testicular pain or swelling, unexplained weight loss, or fatigue

• Relevant family history, including known BRCA gene variants

Although male breast cancer is rare — accounting for less than 1% of all breast cancer diagnoses in the UK — it must be excluded, particularly in older men presenting with unilateral, hard, or irregular breast tissue. According to NICE guideline NG12 (Suspected cancer: recognition and referral), a two-week urgent referral is recommended for people aged 30 and over with an unexplained breast lump, and for people aged 50 and over with unilateral nipple changes (such as discharge, retraction, or other concerning changes). For those under 30 with an unexplained breast lump, a non-urgent referral to a specialist should be considered.

Your GP will take a thorough history, including a full medication review, and perform a physical examination. Initial investigations typically include blood tests to assess liver and kidney function, thyroid function, and hormone levels (LH, FSH, total testosterone — ideally measured between 8am and 11am and repeated if low — oestradiol, prolactin, and beta-hCG). Sex hormone-binding globulin (SHBG) may also be measured where clinically relevant. A testicular ultrasound may be arranged if a testicular cause is suspected or if beta-hCG is raised. Where breast symptoms are suspicious, appropriate breast imaging will be arranged via a symptomatic breast clinic.

In most cases, these investigations will either identify a treatable cause or provide reassurance that the enlargement is benign and physiological. Early assessment not only guides appropriate management but also helps address the psychological impact that gynaecomastia can have on self-esteem and quality of life.

Non-Surgical Treatments Available on the NHS

Watchful waiting is first-line for pubertal gynaecomastia, whilst persistent or distressing cases may be managed off-label with specialist-prescribed medicines such as tamoxifen; no drug is currently licensed specifically for gynaecomastia in the UK.

For many men, particularly adolescents experiencing pubertal gynaecomastia, watchful waiting is the first-line approach. Pubertal cases typically resolve spontaneously within six to 24 months, and active treatment is not routinely recommended during this period unless the condition is causing significant psychological distress or physical discomfort.

Where an underlying cause is identified, addressing it directly is the most effective non-surgical strategy. This may involve:

• Stopping or switching a causative medication under medical supervision — never discontinue prescribed medicines without first consulting your GP or specialist.

• Treating an underlying condition such as hyperthyroidism or hypogonadism, which may lead to gradual regression of breast tissue.

In cases where gynaecomastia is persistent, symptomatic, or causing significant distress, pharmacological treatment may be considered by a specialist. It is important to note that no medicine is currently licensed specifically for gynaecomastia in the UK; any pharmacological treatment is therefore off-label, specialist-led, and not routinely recommended. It may be considered in the early, active phase of the condition, after underlying causes have been addressed, and following a shared decision-making discussion that includes the off-label nature of treatment and relevant risks.

Medicines used in specialist settings include:

• Tamoxifen (a selective oestrogen receptor modulator): Evidence suggests it can reduce breast volume and tenderness, particularly when breast tissue is still soft and proliferating rather than fibrotic. Risks include venous thromboembolism, hot flushes, and hepatic effects; these should be discussed before prescribing.

• Raloxifene has also been used in specialist settings, though evidence is more limited.

• Danazol is occasionally used but has notable androgenic and hepatic adverse effects and is infrequently recommended in current UK practice.

• Aromatase inhibitors (e.g., anastrozole) have generally shown limited benefit, particularly for pubertal gynaecomastia, and are not usually recommended.

For further information on the prescribing and safety of these medicines, refer to the relevant entries in the British National Formulary (BNF) and the electronic Medicines Compendium (eMC). If you experience a suspected side effect from any medicine, report it via the MHRA Yellow Card scheme.

Medical treatment is generally less effective once breast tissue has become fibrotic, which is why early assessment matters.

Surgical Options for Gynaecomastia in the UK

Subcutaneous mastectomy and liposuction are the main surgical options; NHS funding is limited and subject to local ICB criteria, with private costs typically ranging from £3,000 to £6,000.

Surgery is considered the most definitive treatment for gynaecomastia, particularly in cases where the condition has persisted for more than 12 months, where breast tissue has become fibrotic, or where non-surgical approaches have been ineffective. However, surgical correction is not routinely available on the NHS. Access is subject to local NHS Integrated Care Board (ICB) commissioning policies and Evidence-Based Interventions (EBI) criteria, which vary across England. Funding is generally considered only in cases of significant and documented psychological impact or functional impairment. Typical prerequisites may include a stable weight, smoking cessation, and a minimum duration of symptoms.

The two main surgical techniques are:

• Subcutaneous mastectomy (glandular excision): The glandular breast tissue is surgically removed through a small incision, typically at the edge of the areola. This is the preferred approach when true glandular enlargement is the primary concern. It is usually performed under general anaesthetic as a day-case procedure.

• Liposuction: Used when excess fatty tissue is the predominant component, or in combination with glandular excision in mixed cases. It involves the removal of fat through small cannulas inserted via tiny incisions.

In the UK, if surgery is not available through the NHS, many men choose to access treatment privately. Costs typically range from £3,000 to £6,000 depending on the technique and provider. If considering private surgery, it is advisable to:

• Choose a surgeon on the GMC specialist register with specific experience in gynaecomastia correction, and consider checking membership of BAAPS (British Association of Aesthetic Plastic Surgeons) or BAPRAS (British Association of Plastic, Reconstructive and Aesthetic Surgeons)

• Ensure the procedure is carried out in a CQC-registered facility

• Have a thorough pre-operative assessment and a realistic discussion of expected outcomes

Recovery usually involves wearing a compression garment for four to six weeks. Complications, though uncommon, can include scarring, asymmetry, changes in nipple sensation, haematoma, seroma, infection, contour irregularity, and, rarely, skin or nipple necrosis. There is also a risk of recurrence if the underlying cause has not been fully addressed. Smoking cessation before and after surgery reduces complication risk. Results are generally long-lasting when the underlying cause has been treated.

Lifestyle Changes That May Help Reduce Symptoms

Weight management, reducing alcohol, and stopping anabolic steroids can help reduce gynaecomastia symptoms, particularly where these modifiable factors are contributing, though lifestyle changes alone will not resolve true glandular tissue.

Whilst lifestyle modifications alone are unlikely to resolve true glandular gynaecomastia, they can play a meaningful supporting role — particularly in cases where pseudogynaecomastia (fatty tissue) is a contributing factor, or where modifiable risk factors are present.

Weight management is one of the most impactful changes a man can make. Adipose tissue is metabolically active and converts androgens to oestrogens via a process called peripheral aromatisation. Reducing overall body fat through a balanced, calorie-appropriate diet and regular physical activity can lower circulating oestrogen levels and improve the androgen-to-oestrogen ratio. This is particularly relevant in men with obesity-related gynaecomastia.

Exercise — specifically resistance training — can help improve body composition and support overall wellbeing. Whilst exercise does not directly reduce glandular breast tissue, improving chest muscle definition can improve the overall appearance of the chest. Claims that resistance training meaningfully raises testosterone levels in most men are not well supported by evidence, and exercise should be viewed primarily as a tool for body composition and psychological benefit.

Other lifestyle factors worth addressing include:

• Reducing alcohol consumption: Alcohol impairs hepatic oestrogen metabolism and has been associated with gynaecomastia, particularly with heavy or chronic use. NHS guidance on alcohol reduction is available at nhs.uk.

• Stopping anabolic steroid or recreational drug use: These are well-recognised causes of gynaecomastia and cessation is strongly advised.

• Reviewing opioid use: Opioids can cause hypogonadism and contribute to gynaecomastia; discuss with your GP if opioids may be a contributing factor.

• Reviewing herbal supplements and topical products: Lavender oil and tea tree oil have been associated in case reports with endocrine-disrupting effects in males; the evidence is based on limited observational data and is not definitive, but caution is reasonable. Certain soy-based supplements containing phyto-oestrogens have also been implicated in some reports, though evidence remains limited.

• Compression garments: Some men find that well-fitted compression vests help with the cosmetic appearance of the chest whilst awaiting treatment or assessment.

Finally, the psychological burden of gynaecomastia should not be underestimated. Men experiencing low mood, social withdrawal, or anxiety related to their appearance should be encouraged to discuss this with their GP, who can refer to appropriate psychological support services if needed. Addressing mental wellbeing is an integral part of holistic management.

Frequently Asked Questions