I have had headaches for about 2 wks straight now all feeling like they are stemming from the tender spot on back of head, lower right side. No injury?

New headache. Headaches can be a concerning symptom and can have many causes. Some are deserving of emergent treatment. Warning signs are chronic headaches that suddenly change in quality or intensity, multiple headaches a week, new onset headaches that affect one's ability to function, associated vomiting, associated dizziness/double vision/neck ache/fever/weakness, or the need to take daily pain medication.