Dr. John David Mark M.D.

Medications for cystic fibrosis can help control the mucus in the lungs and keep the lungs’ normal functioning as much as possible. What is Cystic Fibrosis?Cystic fibrosis is a genetic disease known to affect the cells that make mucus, digestive fluids, and sweat. Usually, these fluids are thin...

Stridor is a high-pitched sound that is caused by a disrupted airflow. It is a sign of an upper airway obstruction that affects children more than adults. A disrupted airflow is caused by a blockage in the voice box (larynx) or windpipe (trachea). Stridor is most noticeable during inhalation, but...

What is cystic fibrosis?It is a genetic disease that affects both young children and adults. It mainly affects the lungs and the digestive system. When a child inherits two copies of the genes responsible for cystic fibrosis, the child develops the disease.The complications associated with the...

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...

Children, especially the younger ones are prone to have croup. It is a viral infection that causes swelling and inflammation of the vocal cords. Croup is characterized by a bad cough that resembles a barking seal and difficulty in breathing. The virus that causes croup is also the same virus that...

Croup is often characterized by a barking cough sound, which resembles the sound produced by seals. This childhood condition is often caused by a virus that often starts from the nose or mouth, and goes down to the vocal cords and windpipe. The affected areas become inflamed, swollen, and sore that...