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."

Painful sore throats have been a common symptom of previous COVID strains, but Nimbus is gaining attention for what some describe as excruciating pain. Patients have likened the sensation to swallowing razor blades or shards of glass. Other symptoms include fatigue, cough, fever, muscle aches and congestion.