Hello, This is lactation which could also happen with out pregnancy. It could be stimulated by sucking, breast
massage, squeezing or with the help of drugs. If breast continuously stimulated, it can produce enough milk to
feed infant even without pregnancy or breast feeding. This could happen even to women around menopause. Other
low possibility could be primary hypothyroidism which leads to high prolactin hormone levels in blood.
Prolactin hormone leads to milk production. Consult your gynecologist to rule out any growth. Take care.