A newer COVID-19 variant may be causing a severe sore throat in those who contract the infections. Here's what to know about "razor blade throat."

The COVID-19 Nimbus variant is on the rise in the U.S. as many report a painful symptom known as "razor blade throat." If you have a severe sore throat, it's important to rule out strep throat to avoid severe complications.

A new COVID-19 variant spreading across the United States may cause an extremely painful sore throat—dubbed the "razor throat"—among its symptoms. The new "Nimbus" strain, also known as COVID-19 NB 1.