Generally your deer tick will bite you, and then drop on its own. You might have whats called a bear tick. they are very similar looking. My cousin spent about a month in the hospital because he was bit by a deer tick that was a lymes carrier. He damned near died. They flew in specialists from another state to monitor him and do some research. They told him he had been bitten by a deer tick and told him they generally bite, inject the poison and then drop leaving a scab, when it itches, you scratch it then the poison is released into the blood stream.