The Bottom Line

Gynecomastia — the enlargement of breast tissue in men — affects up to 70% of adolescent boys and 24-65% of adult men at some point in life. While usually benign, it can cause skin-related concerns including excess skin, stretch marks, and chafing. A dermatologist can help address the skin aspects while an endocrinologist evaluates hormonal causes.

What Is Gynecomastia?

Gynecomastia is the development of glandular breast tissue in males, caused by an imbalance between estrogen and testosterone. It's different from pseudogynecomastia (excess chest fat without glandular tissue growth), though both can occur together.

Common causes include:

  • Hormonal changes: Puberty (affects 50-70% of boys), aging (declining testosterone), or medical conditions
  • Medications: Spironolactone, finasteride, certain antidepressants, proton pump inhibitors, and anabolic steroids
  • Health conditions: Liver disease, kidney disease, thyroid disorders, and obesity
  • Supplements: Products containing phytoestrogens (lavender oil, tea tree oil in some studies)

Skin Concerns Related to Gynecomastia

Stretch marks (striae): Rapid tissue growth can cause red or purple stretch marks on the chest. These fade over time but may benefit from topical retinoids or laser treatment.

Excess skin: After weight loss or surgical correction, loose skin may remain. Body-contouring procedures can address significant excess.

Nipple changes: Areolar enlargement, nipple sensitivity, or nipple discharge should be evaluated by a doctor to rule out underlying conditions.

Chafing and irritation: Enlarged tissue rubbing against clothing can cause irritation, especially during exercise. Moisture-wicking fabrics and anti-chafing products help.

Psychological impact: Studies show gynecomastia significantly affects self-esteem and body image. Up to 50% of affected men report social anxiety or avoidance of shirtless activities.

When to See a Doctor

  • New or rapidly growing breast tissue at any age
  • Pain, tenderness, or nipple discharge
  • Hard, fixed lumps (to rule out male breast cancer, which accounts for about 1% of all breast cancers)
  • Gynecomastia persisting beyond 2 years in an adolescent

Treatment Options

  • Observation: Pubertal gynecomastia resolves on its own within 6-24 months in 90% of cases
  • Medication review: Stopping or switching causative medications often resolves the condition
  • Medical therapy: Tamoxifen or raloxifene may reduce tissue in selected cases (off-label use)
  • Surgery: Liposuction, gland excision, or combination approaches for persistent cases affecting quality of life
  • Skin treatments: Retinoids for stretch marks, laser for skin tightening, or excision for excess skin post-surgery

Frequently Asked Questions

Can exercise fix gynecomastia?

Exercise can reduce chest fat (pseudogynecomastia) but cannot shrink glandular breast tissue. Building pectoral muscle may improve chest appearance. However, true gynecomastia (glandular tissue) requires medical or surgical treatment.

Is gynecomastia linked to breast cancer?

Gynecomastia itself does not significantly increase breast cancer risk in men. However, any new, hard, or fixed lump should be evaluated, as male breast cancer — while rare — does occur.

Will it go away on its own?

In adolescents, yes — about 90% of cases resolve within 1-2 years. In adults, it depends on the cause. Drug-induced gynecomastia often resolves after stopping the medication. Long-standing gynecomastia (more than 1-2 years) is less likely to resolve spontaneously because glandular tissue becomes fibrotic.

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  2. Kanakis GA, et al. "EAA clinical practice guidelines — gynecomastia evaluation and management." Andrology. 2019;7(6):778-793.
  3. Narula HS, Carlson HE. "Gynecomastia — pathophysiology, diagnosis and treatment." Nature Reviews Endocrinology. 2014;10(11):684-698.