Health Library

Articles In This Section

• A to Z: Burn, Third-Degree

  Third-degree burns, or full-thickness burns, are the most serious type of burn. They involve all the layers of the skin and underlying tissue and can cause permanent damage.

• A to Z: Burn, Second-Degree

  A second-degree burn affects the top two layers of skin (the epidermis and dermis). It is more serious than a first-degree burn.

• A to Z: Burn, First-Degree

  A first-degree burn is a minor burn that only affects the top layer of skin, or epidermis. It is the mildest of the three types of burns (first-degree, second-degree, and third-degree).

• A to Z: Bulimia

  Learn about eating disorders and complications of negative thoughts about eating, food, and body image.

• A to Z: Bruxism

  Bruxism is the medical term for grinding the teeth or clenching the jaws.

• A to Z: Bronchitis

  Bronchitis (say: bron-kye-tis) is an inflammation of the lining of the bronchial tubes, the airways that connect the trachea (windpipe) to the lungs.

• A to Z: Bronchiolitis

  Bronchiolitis is a common illness of the respiratory tract caused by an infection that affects the bronchioles, tiny airways that lead to the lungs.

• A to Z: Blood in Stool

  Blood in the stool means the presence of blood in a bowel movement.

• A to Z: Blisters

  After a burn or excessive pressure to the skin, a fluid-filled pocket in the skin can form and cause pain and irritation. Learn more here.

• A to Z: Blood in Urine

  See: Hematuria (Blood in Urine).

• A to Z: Body Dysmorphic Disorder (BDD)

  Learn about mental health disorders and causes of low self-esteem and negative thoughts about body image.

• A to Z: Borderline Personality Disorder (BPD)

  Learn about personality disorders and complications of mental illness.

• A to Z: Botulism

  Learn about bacterial infections, foodborne illnesses, and conditions that affect the nervous system.

• A to Z: Botulism, Foodborne

  Learn about bacterial infections, foodborne illnesses, and conditions that affect the nervous system.

• A to Z: Botulism, Infant

  Learn about bacterial infections, foodborne illnesses, and conditions that affect the nervous system.

• A to Z: Botulism, Wound

  Learn about bacterial infections, foodborne illnesses, and conditions that affect the nervous system.

• A to Z: Breast Mass/Fibroadenoma

  Learn more about this type of noncancerous tumor, common in women ages 15-35.

• A to Z: Blepharitis

  Learn about the causes of eye irritation and conditions that can affect the eyes and eyelids.

• A to Z: Bipolar Disorder

  Childhood bipolar disorder leads to extreme mood shifts for boys and girls. Read more about the significant signs of bipolar disorder in children.

• A to Z: Beriberi

  Learn about complications of poor nutrition and conditions that can affect the cardiovascular and nervous systems.

• A to Z: Barrett’s Esophagus

  Learn about complications of acid reflux and conditions that affect the esophagus and upper gastrointestinal tract.

• A to Z: Balanoposthitis

  Learn more about this inflammation of the foreskin and head of the penis.

• A to Z: Babesiosis

  Learn about parasitic infections, tickborne illnesses, and conditions that affect the bloodstream and red blood cells.

• A to Z Symptom: Back Pain

  Back pain is fairly common, and is often due to muscle strain or sprain. In students, wearing a heavy backpack is a common cause.

• A to Z: Bacterial Vaginosis

  Bacterial vaginosis (BV) is an infection in the vagina.

• A to Z: Balanitis

  Learn about conditions that affect the penis and foreskin.

• A to Z: Biceps Tendonitis

  Learn more about biceps tendonitis and how it's treated.

• A to Z: Benign Joint Hypermobility Syndrome

  Learn about inherited disorders and conditions that can affect the joints and connective tissues.

• A to Z: Bronchiectasis, Congenital

  See: Bronchiectasis.

• A to Z: Bronchiectasis, Acquired

  See: Bronchiectasis.

• A to Z: Bronchiectasis

  Learn about causes of breathing difficulties and conditions that can affect the lungs and bronchi.

• A to Z: Bullous Myringitis

  Learn about bullous myringitis, an infection of the tympanic membrane (eardrum).

• A to Z: Beta Thalassemia

  Learn about genetic disorders and diseases and conditions that affect the blood.

• A to Z: Bell’s Palsy

  Learn about complications of viral infections and conditions that can affect the face and nervous system.