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. …

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 …

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 …

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

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: …

Concussion screening tools measure physical skills such as balance. They also measure mental skills such as memory, concentration, attention, and how quickly you can think and solve problems. These …

Feb 15, 2018 · Results from multiple studies indicate that valerian — a tall, flowering grassland plant — may reduce the amount of time it takes to fall asleep and help you sleep better. Of the many valerian …

Dec 11, 2024 · This is the body's response when the throat or airways are irritated. Coughing once in a while isn't unusual. But a long-term cough may mean a medical problem.

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