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.
The dental causes of tooth pain fall into several categories: 1  Damage: Damage to the tooth is a common cause of tooth pain. For example, teeth that are chipped or broken due to trauma can cause tooth pain. 2  Decay: Tooth decay is one of the most common causes of tooth pain, and it has several degrees of severity.