cyst- im having a lot of pain

Hi,
Welcome to ehealthforum,
It is difficult to comment on the symptoms that you describe without examining you. Consider requesting your treating doctor to go ahead with mammogram along with tumor marker tests done to rule out cancerous/pre-cancerous changes. Follow the instructions given by your treating doctor. Further management will be started based on examination findings and investigation results. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest.
Take care.

Each of your breasts contains 15 to 20 lobes of glandular tissue, arranged like the petals of a daisy. The lobes are further divided into smaller lobules that produce milk during pregnancy and breast-feeding. Small ducts conduct the milk to a reservoir just beneath your nipple. Supporting this network is a deeper layer of connective tissue called stroma.

Breast cysts develop when an overgrowth of glands and connective tissue (fibrocystic changes) block milk ducts, causing them to dilate and fill with fluid.

Macrocysts are large enough to be felt and can grow to about 1 to 2 inches (2.5 to 5 centimeters) in diameter. Large breast cysts can put pressure on nearby breast tissue, causing breast pain or discomfort.

The cause of breast cysts remains unknown. Some evidence suggests that excess estrogen in your body may play a role in breast cyst development.