Dec 20, 2025 · If you have an erection lasting more than four hours, you need emergency care. The emergency room doctor will determine whether you have ischemic priapism or nonischemic priapism. …

Victoria E. Clark, M.D., Ph.D., is a Senior Associate Consultant in the Department of Neurologic Surgery and the State of Florida Endowed Chair of Cancer Research at the Mayo Clinic's Florida campus. Dr. …

Dec 19, 2025 · Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.

Feb 5, 2022 · Classifying TBI severity Many medical centers use the VA/DoD Clinical Practice Guideline for the Management and Rehabilitation of Post-Acute Mild Traumatic Brain Injury (mTBI), based on …

Jan 9, 2025 · Hemochromatosis (he-moe-kroe-muh-TOE-sis) is a condition that causes the body to absorb too much iron from food. Excess iron is stored in the organs, especially the liver, heart and …

Oct 14, 2025 · Lice are tiny, wingless insects that feed on human blood. Lice spread from person to person through close contact and by sharing clothes and other items. There are three types of lice: …

Jan 4, 2023 · Overview Even the best-behaved children can be difficult and challenging at times. But oppositional defiant disorder (ODD) includes a frequent and ongoing pattern of anger, irritability, …

Sep 30, 2005 · Learn causes of low blood oxygen and find out when to call your doctor.

Dec 24, 2025 · Some groups recommend people over 75 may consider stopping colon cancer screening. Not everyone agrees. Learn about your colon cancer screening options.

Jun 5, 2024 · An olfactory hallucination, known as phantosmia, makes you detect smells that aren't in your environment. The odors you notice in phantosmia are different from person to person and may …