I'm sorry to hear about the changes you're experiencing. A decrease in breast size accompanied by milk discharge (galactorrhea) can be concerning and may be related to hormonal imbalances, particularly involving the hormone prolactin.

Possible causes include:

• Hyperprolactinemia: Elevated prolactin levels can cause milk production even without pregnancy or breastfeeding. This condition may also lead to breast tissue changes affecting size.
• Pituitary gland issues: Sometimes, benign tumors (prolactinomas) on the pituitary gland can increase prolactin secretion.
• Medications: Certain drugs can raise prolactin levels and cause milk discharge.
• Other hormonal imbalances: Thyroid problems or other endocrine disorders might contribute.

Given these symptoms, it is important to consult an endocrinologist or a gynecologist. They can perform appropriate evaluations, including blood tests to measure prolactin and other hormone levels, and imaging studies if needed.

If you have been prescribed or are considering medications like Cabergoline (which reduces prolactin levels), this should only be taken under medical supervision.

Please seek prompt medical advice to determine the exact cause and receive appropriate treatment. If you experience additional symptoms such as headaches, vision changes, or severe pain, seek urgent care immediately.To narrow down potential causes, we will need some more information.Do you have any past medical conditions?