Some degree of breast tenderness is normal. The discomfort may be caused by hormonal changes due to:

• Menstruation
• Pregnancy -- breast tenderness tends to be more common during the first trimester and in women who are pregnant at a young age
• Puberty -- in both girls and boys
• Breast feeding
• Approach of menopause -- once your menstrual periods have stopped completely, breast tenderness often goes away unless you are taking hormone replacement therapy

Soon after childbirth, your breasts may become swollen with milk. This can be very painful and is usually accompanied by swelling. If you also have an area of redness, call your health care provider.

Other common causes of breast pain include:

• Alcoholism with liver damage
• Fibrocystic breast changes
• Injury
• Mastitis
• Premenstrual syndrome (PMS)

Fibrocystic breast tissue is common. Such tissue contains breast lumps and bumps that tend to be more tender just before your menstrual period.

Certain medications may also cause breast pain, including digitalis preparations, aldomet, aldactone. certain diuretics, anadrol, and chlorpromazine.

Shingles can lead to pain felt in the breast if the painful blistering rash appears on the skin over one of your breasts.