Dr. Mark Thomas O'hollaren M.D.

IntroductionThe eye is one of the sensitive parts of the body, and it easily gets affected by any irritants such as microbes. Eyes turning red would be due to not getting enough sleep or not blinking enough in a day. In certain cases, it can also be a sign of some kind of infection or...

Lymphocytes are a type of white blood cell produced in the bone marrow. A few lymphocytes enter the bloodstream while some move into the lymphatic system. Having a low or high lymphocyte count can help identify a person's medical condition. Normal lymphocyte counts usually vary from one laboratory...

In the early 19th to the 20th century, parents would have been surprised to know that future generations would be free from childhood diseases. Diphtheria was then one of the most common diseases that took the lives of thousands of children, while polio left thousands of children crippled. Measles...

Eczema is the general term of a number of skin conditions. Doctors believe that the condition is passed on genetically and results from a disorder of the immune system. This disorder results in the overreaction of the system when it encounters certain triggers in the environment.Eczema can affect...

The chicken pox vaccine is the medicine given to people who are susceptible to the disease and hence protects one against the vaccine. This vaccine that causes the chickenpox disease is the varicella vaccine. This chicken pox vaccine is usually excavated from a weak virus. This weak virus is...

The chance of getting infected by Lyme disease from a single bite depends on the type of the tick, how long it has been attached, and where it is acquired from. There are many types of ticks and not all of them can cause Lyme disease. The symptoms of Lyme disease are rash, fatigue, fever, facial...