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.
A tooth infection is a common term that is used to describe an infection between the gums and a tooth or at the root of a tooth. It is often caused by bacteria entering the tooth through a chip, dental cavity, or crack and will spread all the ways down to the tip of the root.