Dr. John Brian O'donnell M.D.

Recommended Articles

• What Is Acid Reflux: Causes, Treatment, and Prevention

  Acid reflux is a common condition wherein a person feels an internal burning pain in the lower chest area due to the stomach acid backflow into the esophagus (food pipe). Once in a while, acid reflux may be experienced. It is a common condition, which you should not worry about. However, if you...

• What Is Hormone Therapy?

  Hormone therapy is often used to relieve menopausal symptoms. However, since estrogen plays a crucial role in maintaining bone health, hormone therapy is another treatment option for osteoporosis.How does hormone therapy work?Following menopause, your body produces less estrogen and progesterone...

• A Guide to Recognizing the Early Signs of Shingles

  Shingles, also known as herpes zoster, is a disease that occurs due to the reappearance of the varicella-zoster virus, which is the causative agent of chickenpox. Shingles usually starts with a skin rash. These skin rashes occur either in the form of a band or a strip covering a small area on your...

• What Is Diarrhea: Get the Facts

  Diarrhea is a very common water-borne disease. A person who has diarrhea passes loose or liquid stool at least three times a day or more frequently than what is normal for the person. The reason behind the consistency and frequency of these bowel movements in a case of diarrhea is the increased flow...

• Is Shingles Contagious? How Do You Get Shingles?

  Shingles is a contagious viral infection that is caused by the varicella zoster virus, the same virus that causes chickenpox. This virus affects a particular nerve section, causing painful rashes on the skin connected to that particular nerve. The rash normally appears in a form of a band on any...

• Pneumonia: Are There Multiple Types?

  What is pneumonia?Pneumonia is an acute lung infection that causes inflammation of the air sacs in either one or both lungs. The air sacs get filled with fluid or pus, making it difficult for the affected person to properly breathe. Individuals who have contracted the infection usually cough and...