Breast cysts are a common diagnosis and often change with the menstrual cycle. They can vary in size, ranging from small microcysts to larger cysts.
Some people may develop a single cyst, while others may have multiple cysts. Typically, these cysts are asymptomatic and may be discovered via a mammogram or other scan.
In some cases, they may become palpable under the skin or cause pain or nipple discharge. Breast cysts are generally filled with fluid. If they grow large enough to cause pain, they may require draining.
If multiple or complex cysts are present, more testing, like a breast ultrasound or biopsy, may be necessary to rule out cancer.

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