Dr. Vivian S Yee M.D.

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....

In normal cases, shafts of hair pierce the skin pores called follicles, and emerge externally to form a protective covering for skin. Sometimes, the same hairs curve backward and re-enter the skin creating small bulbous fluid-filled sacs, that become prone to infection. Such a condition is called an...

What are cold sores?Cold sores or fever blisters are a very common perioral condition caused by the herpes simplex virus (HSV). There are two types of herpes simplex virus. Type 1 usually causes cold sores, although in some cases, the cold sores can also be caused by type 2. It is usually...

Melanoma is a form of skin cancer that develops in the melanocytes, which are the cells that determine your skin color because of the melanin pigment. Melanoma has the ability to develop in various parts of the body including the eyes, nails, mouth, as well as some internal organs such as the...

What is cat scratch fever?Cat scratch fever is also known as "cat scratch disease", which is a type of bacterial infection. The disease got its name because humans contract the infection from cats that are infected with the bacterium called Bartonella henselae, which is one of the most common...

Swellings, referred to as weals, manifest on the skin as rashes. They are normally pink or red in color, possess an oval or circular shape, and may be surrounded by a reddish flare. Hives can be detrimental and awfully itchy.The weals normally appear in batches, and frequently occur on the face,...