At this point in the pandemic, most people have become very aware of the major signs of COVID-19. However, there are still some symptoms that don’t get a lot of attention and, of course, ones that ...

At this point in the pandemic, most people have become very aware of the major signs of COVID-19. However, there are still some symptoms that don’t get a lot of attention and, of course, ones that ...

Bluish discoloration of the skin may signal a lack of oxygen in the blood. It could also indicate an abnormal form of hemoglobin (a protein in red blood cells) like it does with sickle cell anemia.

There’s a purple-bluish glow coming from some of the lights above highways in Western Pennsylvania. It’s a bizarre look. What’s causing it, and is anything being done to address it? Chief Investigator ...

Bluish skin discoloration (cyanosis) may affect your hands, feet, or entire body. Possible causes include heart, lung, and circulatory conditions, some of which are life threatening. Many conditions ...

Do you have bluish nails? Ringing in your ears? Less sense of taste and smell? Kathie Lee and Hoda welcome NBC News medical contributor Dr. Natalie Azar, who explains when you need to pay attention to ...

Rensselaer Polytechnic Institute is trying to help Alzheimer's patients experience fewer behavioral issues. Robert Siegel speaks with researcher Mariana Figueiro and psychiatrist Guerman Ermolenko.