What is a bullseye rash on the skin? This is a skin rash caused by a type of bacterium that is not normally found on the human skin. How does it get there? Basically, it is transferred to human skin from certain animals via ticks. When a tick bites and feeds on an animal that is infected with the bacteria and then subsequently ends up on a human and bites him or her, then there is the possibility of the human being infected with the bacteria. If this occurs then a bullseye skin rash can develop. This type of rash is also commonly known as a Lyme disease rash.
The reason for the name of this rash is quite simple. The rash that appears on the skin looks like the center area of a dartboard or in other words the bullseye area. The rash does not appear right away after the tick bite, but rather after a few days of being bitten by the tick carrying the bacteria. Initially, a tiny red spot is evident at the site of the bite, but this little spot eventually grows wider and in the shape of a red circular patch or slightly oval patch. After a few days, the area close to the tick bite site starts to fade and therefore you have a red spot at the bite site that is surrounded by a ring of non-red skin or normal skin color and then a red ring on the outside of this area. Therefore, after a few days the characteristic pattern for this rash forms.
The affected area can be quite large in some cases and spread to twelve inches in diameter. The characteristic bullseye pattern may also disappear in a short amount of time. If the Lyme disease progresses a skin rash on other parts of the body may appear.
This type of skin rash can be somewhat painful, with a burning sensation and itching being the main symptoms.
The pictures of skin rashes provides additional skin rash information on this and many other rashes.
Another useful resource is the diagnose my skin rash page, which provides more detailed information on Lyme disease rash and on a number of other different types of rashes that can affect the skin.
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