Causes can be divided into:
Physiological
- adolescence
- increasing age - due to low testosterone
Drugs (a mnemonic to remember drugs causing gynaecomastia is a addicts hammock)
- antipsychotics
- ACE inhibitors
- digioxin
- diazepam
- isoniazid
- cimetidine
- TCA
- spironolactone
- heroin
- amiodarone
- metronidazole
- marijuana
- omeprazole
- calcium channel blockers
- ketoconazole
Pathological
- klinefelters
- liver cirrhosis
- hyperthyroidism
So from enlarged breasts to enlarged gums...