Dr. John Mark Heyer M.D.

Recommended Articles

• What Are Roundworms?

  What are roundworms?Roundworms are a type of parasitic worms that infect the human intestine. Roundworms may vary and size and have a characteristic long, round body. These parasitic worms can cause a number of health problems in humans. They can enter the human body through the mouth and direct...

• What Are Ketones?

  Almost every cell in the body has a primary source of energy, which is usually glucose. However, when the body doesn't have enough glucose, the liver responds by producing chemicals known as ketones, converting stored fatty acids into ketone bodies. Ketones are used as a backup fuel source when...

• Can Sinusitis Be Caused by Allergies?

  The inflammation of the sinuses found in your forehead, cheekbones, and behind your nose is what is known as sinusitis. Sinusitis can be a short-term inflammation resulting from a bacterial infection after an infection like the common cold. However, sinusitis can also be chronic, resulting from...

• Are Vaccines Safe for My Baby Under All Circumstances?

  Are there any circumstances under which vaccination of young children is forbidden?There are particular conditions when the immunization of your child, unfortunately, cannot be performed. If all terms and conditions are followed accordingly, complications are avoidable. These are the circumstances...

• Hypolipidemia: Causes and Symptoms

  The liver primarily produces cholesterol. Each day, it makes 1,000 mg of cholesterol. The cells lining the small intestine can also produce cholesterol. If the level of cholesterol in the body is low, it may mean that the body is producing low amounts of cholesterol and is going to shut down. In...

• Poison Ivy, Poison Oak, Poison Sumac: The Rashes

  What is poison ivy? Poison ivy (Toxicodendron radicans) is a popular plant known for causing rashes and skin irritation when one comes in contact with it.Poison ivy is a woody shrub or vine that is found in either shady or sunny locations. It can grow up to six feet tall as a shrub, or 150 feet tall...