How long have it been? Do you have fever?
Did you measure the temperature? When did you start tylenol?
It might be an infection, such as flu. You might have high temperature. You might not feel it, Or Tylenol decreased the temperature. There are many other possibilities. It is difficult to diagnose without a thorough examination. You should see a doctor as soon as possible for evaluations. If you have high fever, you should call 911 or be taken to an emergency room.
You can find details by clicking the blue/purple color link at the bottom.
I want to give you an answer as soon as possible. Thus, it is very brief. If you need more information, please feel free to ask. If you are satisfied with the answer, please click the green "accept" button to credit my effects. Otherwise, please tell me why you are not satisfied, and I will try my best to meet your needs.