My mastoid process was hit in a combat five days ago. After being hit, I was fully conscious and able to move. Since then, I have been feeling sore on the surrounding organ such as neck stiffness and little bruise on the back of my left ear. The pain has faded away over time, but it is already on the fifth day and I am worried that it might result in infection or further bleeding in one of the organs. Should I take medication to prevent severe impacts or is it alright not to worry since it has been fading away over time?