A closer look at the structure of the breast.

Back and neck pain can interfere with your ability to function. Overuse, overweight, and other problems can cause back and neck pain.

Detailed information on the most common bacterial skin infections, including cellulitis, folliculitis, boils, carbuncles, and staphylococcal scalded skin syndrome

Detailed information on halitosis (bad breath), including causes and treatment.

Detailed information on balance disorders, including acoustic neurinoma and Ménière's disease

Baldness, or hair loss, can be caused by many things including aging, hormones or illness. It's more common in men and can be treated with hair transplants or other procedures.

Barrett esophagus is when the normal cells that line your food pipe (esophagus) turn into cells not usually found in your body. The new cells take over because the lining of the esophagus has been damaged. The new, abnormal cells are called specialized columnar cells.

Located almost in the center of the chest, the adult human heart is about the size of a fist.

A caregiver provides assistance in meeting the daily needs of another person.

Bell's palsy is an unexplained episode of facial muscle weakness or paralysis that begins suddenly and gets worse over 48 hours. It is caused by a damaged facial nerve.

Detailed information on the most common benign bone tumors, including chondroblastoma, enchondroma, giant cell tumor, and osteochondroma

Benign prostatic hyperplasia (BPH) is also called benign prostatic hypertrophy. It’s when the prostate gland becomes very large and may cause problems passing urine. BPH is not cancer. It's a common part of aging.

Detailed anatomical description of the biliary system, including a full-color labeled illustration.

Detailed information on biofeedback as a form of alternative therapy.

Biofeedback is a method used to improve health by controlling certain body processes that normally happen involuntarily. It does not appear to affect cancer cells, but it has helped patients reduce severity and occurrence of headaches and chronic pain.

Detailed information on biological therapy, also called immunotherapy, biological response modifier therapy, or biotherapy.

A detailed look at different types of biopsies, and how and why they are done.

Detailed information on biopsy and the biopsy report.

Your baby may not have been delivered by stork, but some infants are left with "stork bites" on the backs of their necks. These pink or red patches are just one type of birthmark or variation in skin color that are common in babies.

Detailed information on animal stings.