Dr. John A Zitelli M.D.

What is nodular melanoma?Nodular melanoma is one of the five subgroups of melanoma. It usually develops in the cells of the skin that produce the pigment called melanin, which gives the skin its color. Approximately 15 percent of melanoma cases are nodular melanoma and is the most aggressive...

What are the Signs and Symptoms of Heat Rash?Heat rash is a condition that affects the skin when it is exposed to high temperatures, and sweat gets trapped beneath the layers of the skin. Victims of this condition usually experience general symptoms such as:...

Cold sores, also called oral herpes, are highly contagious fluid-filled blisters on the lips and around the mouth. In most cases, cold sores are not that serious, but they can be life-threatening for people who have a weakened immune system such as people with AIDS. On the other hand, canker sores,...

A cold sore is a common viral infection which is caused by Herpes Simplex Virus or HSV. HSV is quite commonly present in all our blood streams and wakes up when our immune system gets suppressed or weak. So often when one has fever or cold, they can observe small, fluid-filled blisters, usually in a...

Petechiae are tiny dots that appear as red, brown, or purple in color beneath the skin. They are usually seen in clusters on the stomach, buttocks, arms, and legs. However, they may also appear inside the mouth or on the eyelids. Petechiae may indicate different conditions, which can range from...

How Can I Have Glowing Skin?Is there anything that can make your skin brighter and more noticeable even without make-up? Yes, your glowing skin! It is true that hereditary factors play a role in getting that glow, but that's really just the beginning. People need to diligently follow good skin care...