Your body sends urgent signals through pain. Intense, sudden pain, or pain with other alarming signs, demands attention. Chest pain, severe pelvic pain, sudden severe headaches, persistent abdominal pain,

While the brain itself doesn’t have any nerve sensors to feel pain, blood vessels in the head and structures that protect and surround the brain do sense pain. When these tissues detect injury or damage, they release chemicals that trigger transmission of electrical signals through nerves to tell the brain the head is hurting.