Dr. Billy Hoon Chang MD, PHD

What is seborrheic dermatitis?Seborrheic dermatitis, or seborrhea, is a common skin disease that has no known direct cause. It is characterized by a red, itchy rash on the skin, often on the scalp, with scaly patches that flake off. It looks similar to eczema, psoriasis or an allergic reaction....

What is a barking cough?The medical term for a barking cough is croup, which is a viral condition that causes swelling of the upper airways of children, especially those who are younger than 5 years old. It is also described as the inflammation of the larynx and the trachea in children.There are a...

When it comes to the treatment of autism, researchers are still struggling to fully understand what options are best. In addition to learning how to treat the symptoms of autism, doctors are also still trying to figure out exactly what causes the condition to develop in certain children. While there...

What are some considerations with regard to vaccination?Never hide anything from your GP while he is deciding about the shots for your baby as your carelessness might have grave after-effects (side effects) for your baby. If your baby has diarrhea or is recovering from the flu, it would not be the...

The definition of autism is ever redefined. As doctors, researchers, and parents learn more and more about this neurodevelopmental disorder, it’s essential to reevaluate past knowledge and ideas. This is especially important with autism as it is not a simple on-off disease, but rather, encompasses...

Pertussis is an infection of the upper respiratory system. The disease is highly contagious and spreads through the coughing and sneezing of an infected individual. This highly contagious and airborne disease is caused by the bacteria called Bordetella pertussis. The symptoms of pertussis typically...