Dr. Dana Collier Holl M.D.

Heat rash, prickly heat, or miliaria is a condition that results from the blockage of the sweat ducts. This condition usually affects people living in hot and humid places. As a result of the blocked pores of the skin (sweat ducts), perspiration is trapped under the skin. Once sweat is stuck in the...

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...

What is petechia?The definition of petechia falls under the category of hemorrhaging. A petechia, or more commonly used in Latin plural, petechiae, are microscopically small dots which appear beneath the skin surface in red, brown or purple color. We refer to them in plural because they are barely...

IntroductionThe scabs that occur on the scalp can be quite itchy, frustrating, and unsightly. Scratching the scalp can also worsen the problem along with increasing the risk of developing an infection. In most cases, the scabs on the scalp tend to clear up on their own without the use of...

Syphilis is a sexually transmitted disease that affects both men and women. The most common locations for the chancre to appear are in the penis, vagina, anus, and even in the oral cavity. There is not much difference in men and women as far as symptoms, diagnosis, and treatments are concerned....

Ingrown hairs are an aesthetic nightmare, causing not only social isolation but emotional distress and recurring pain, besides constantly burning skin. It effects a good proportion of the population, and people scramble to pinpoint the medical and non-medical remedies to cure themselves of this...