Had ear infection tht spread, jaw cldnt open & stabbing pain in head behind infected ear. pain in head has returned months later. shld i b concerned?

See you PCP: Always pay attention to a new or recurrent/worsening pain. This could be a recurrent infection or mechanical damage from the previous infection. Or maybe you are grinding your teeth at night. A quick look in your ear and exam of the jaw and teeth should go a long way to ruling out these possibilities. It is always better to have things evaluated early BEFORE they have a chance to spread.