Dr. Mark Alan Lichtenfeld M.D.

The ketogenic diet is a high-fat, low-carb, adequate-protein diet that was designed by Dr. Russell Wilder in 1924. It became popular then for its effectiveness not only in treating epilepsy but in weight loss. After a few years, the popularity of the ketogenic diet began to wane as new...

Croup in AdultsAlthough croup is commonly observed in children who are 6 months to 3 years old, it is also possible for adults to get the infection in rare cases. Croup is a viral respiratory infection caused by human parainfluenza viruses (HPIVs). However, other causes of croup may include...

What is yawning?Usually, yawning is associated with boredom, fatigue, and tiredness. Yawning is also very common in animals, such as dogs, monkeys, snakes, and carnivores. Yawning is also associated with numerous superstitious beliefs.In humans, yawning is considered as a purposeful non-verbal...

If you are suffering from IBS-D, you may experience belly pain that is usually associated with irritable bowel syndrome (IBS) and you will be forced to make several trips to the bathroom. The letter "D" stands for "diarrhea".General CausesThere is no actual cause of IBS-D. However, the following are...

What is Bell’s Palsy?Bell’s palsy is a medical condition that causes temporary weakness or paralysis of the facial muscles. This medical condition is named after the Scottish anatomist named Charles Bell. He was the first one to describe the condition. Bell's palsy usually happens when the...

Causes of Fainting A person faints or loses consciousness for a brief time when the brain does not get enough oxygen. Fainting or passing out is also medically called syncope. Before fainting, people may experience lightheadedness, dizziness, weakness, and nausea. Others describe fainting as...