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.
Cavities form in the roots and surface areas of a tooth. They are generally caused from a lack of proper oral health care, such as cleaning and brushing. They can also be caused from excessive consumption of sugary drinks and snacks. Cavities are a leading cause of headache pain.