'Razor Blade Throat': New COVID-19 Symptom Triggers Intense Pain; Doctors Explain Why

After a period of relative calm, COVID-19 is making a resurgence worldwide, with new cases emerging. The new variant, nicknamed Nimbus, is currently under observation. Doctors report that it generally does not cause severe illness, with most individuals recovering at home through rest and hydration. However, a significant symptom increasingly associated with this variant is intense throat pain, often described as "Razor Blade throat". The discomfort is reportedly so acute that it feels as though one is swallowing razor blades. Let's delve into this emerging symptom and explore the reasons behind its severity.

Understanding the "Razor Blade" Sore Throat

The term "razor blade sore throat" describes the extreme throat pain linked to the Nimbus variant of COVID-19. Unlike the milder sore throats experienced with earlier strains, this symptom is characterized by its sharp and intense pain. Many patients describe the simple act of swallowing food or water as an arduous task. First reported in China when the variant emerged in May 2025, it has since spread to the U.S. and other countries. Nimbus is now responsible for approximately one-third of COVID-19 cases in the U.S.

Why Does Nimbus Cause Such Intense Pain?

COVID-19 primarily targets the respiratory system, entering the body through the nose, mouth, and throat – all components of the upper respiratory tract. In the initial stages of infection, the virus replicates within the lining of the throat. This triggers the body's immune response, leading to inflammation and swelling of the throat tissues.

With the Nimbus variant, this immune response appears to be particularly strong or focused in the throat region. Doctors suggest several potential reasons:

• New variant aggressiveness: Nimbus might be more effective at infecting throat cells compared to previous variants, causing greater damage and irritation.

• Exaggerated Immune response: Due to widespread vaccination and prior COVID-19 infections, individuals' immune systems may react more aggressively to Nimbus. The throat contains numerous lymph nodes and immune cells, which can trigger intense inflammation upon activation as a defense mechanism.

• Shift in virus patterns: As the virus evolves, its symptomatic patterns can also change. Earlier variants were often associated with loss of taste and smell, while newer variants like Nimbus are more likely to cause severe throat pain.

How Does It Differ From a Regular Sore Throat?

Sore throats can result from various causes, including the common cold, flu, allergies, acid reflux, or bacterial infections like strep throat. The defining characteristic of the COVID-19 "razor blade" sore throat is the extreme sharpness and severity of the pain. However, it's important to note that extreme throat pain is not exclusive to COVID-19.

Doctors caution that, given the symptom overlap with other illnesses, differentiating a COVID-19 sore throat from other causes can be challenging. If the pain is severe or persists for more than a few days, it is crucial to get tested for COVID-19. Even if the test is negative, a doctor can determine if antibiotics are necessary to treat the infection.

Other Symptoms of the Nimbus Variant

In addition to the severe sore throat, Nimbus presents symptoms similar to those of other COVID-19 variants:

• Fever (ranging from low to high grade)
• Cough (Whooping)
• Fatigue
• Muscle aches
• Headaches
• Loss of taste or smell (less common)

Some individuals may also experience swollen lymph nodes or difficulty swallowing due to throat inflammation.

Finding Relief from a 'Razor Blade Throat'

Although the pain can be intense, there are several ways to alleviate the discomfort at home:

• Stay hydrated: Consume plenty of fluids like water, warm tea, or broth to soothe the throat and prevent dryness. Avoid extremely hot beverages, as they can further irritate the throat. Lukewarm is the ideal temperature.
• Use throat lozenges: These can temporarily numb the throat and reduce pain.
• Gargle with warm (not hot) salt water: This helps reduce inflammation and kill some bacteria in the throat.
• Rest your voice: Minimize talking to prevent further irritation.
• Over-the-counter pain relievers: Medications such as acetaminophen or ibuprofen can help reduce pain and inflammation. Consult with a doctor before use.

If your sore throat worsens, lasts for more than a week, or is accompanied by difficulty breathing or swallowing, seek immediate medical attention.

Sources:

WebMD, “Why COVID 'Razor Blade' Sore Throat Hurts So Bad,” June 26, 2025

Everyday Health, “How to Cope With a COVID-19 Sore Throat,” June 23, 2025

Healthline, “New COVID Variant Nimbus May Cause Painful ‘Razor Blade Throat’ Symptom,” June 19, 2025