Breast hyperplasia mainly manifests as cyclical breast pain and tenderness, which often appears or worsens before menstruation and lessens or disappears after menstruation. Mild cases may not catch the patient's attention, while severe cases can affect daily life and work. However, some patients do not show obvious cyclical changes. Symptoms can include unilateral or bilateral breast fullness and pain or needle-like pain, which may extend to the shoulders, upper limbs, or chest/back area. A few patients may experience nipple discharge that can be yellow-green, brown, serous, or bloody. The condition can persist for a long time, but symptoms may disappear or lessen after menopause.