Medically reviewed by Christine L. Larsen, MD Medications, trauma, and medical conditions can lead to abnormally small pupils ...

Pupils in older persons shrink and don’t dilate as well as they used to, causing an effect similar to wearing sunglasses — dangerous for night driving.

To meet these variable demands, the heartbeat increases or decreases, and blood vessels dilate to deliver more blood or constrict during times when less blood is required. When a person is ...

Cinnamon may help dilate and relax blood vessels, potentially lowering blood pressure. Use it in oatmeal, yogurt and fruit salads.