Most medications do not prevent you from donating blood. Common medications such as those used to control blood pressure, birth control pills and over-the-counter medications do not affect your eligibility. If you have recently taken antibiotics, you must have completed the course prior to donating.
Yes, a tooth infection can cause a headache. Also, be aware that certain sinus conditions can mask as tooth problems.
Abscessed Tooth. An abscessed tooth is a leading cause of headache. An abscessed tooth is caused from a severe cavity or crack in the tooth that has lead to infection of the tooth and its surrounding tissue. The trigeminal nerve is the main nerve center of the head and face.