Mr. Marcus A. Johnson M.D.

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• A Guide to Recognizing the Early Signs of Shingles

  Shingles, also known as herpes zoster, is a disease that occurs due to the reappearance of the varicella-zoster virus, which is the causative agent of chickenpox. Shingles usually starts with a skin rash. These skin rashes occur either in the form of a band or a strip covering a small area on your...

• What Should I Know About Bruises?

  A bruise is a skin injury in which the color of the skin changes due to the breakage of blood vessels under the skin. The affected skin becomes blue or black in color, as blood accumulates just under the surface of the skin, resulting in a raised area or bump. These bumps are painful and may take a...

• What is Addison’s Disease: Is it Life-Threatening?

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• What is Hepatitis B?

  Hepatitis B, also known as HBV, is a disease caused by the Hepatitis B virus. This virus interferes with liver functions and can cause pathological harm. Normally, the infected person can get rid of this virus, but very few cannot, and thus becomes chronically infected. This virus can be fatal,...

• Is Syphilis an STD?

  What is an STD?Sexually transmitted disease, or commonly known as STD, is a type of disease that gets transmitted through sexual contact. AIDS caused by the HIV virus is a primary example of a sexually transmitted disease. Most STDs do not have any obvious symptoms at the beginning, aside from the...