The Cicada variant (BA.3.2) is now the main COVID strain in the UK. Its standout symptom is a severe, stabbing sore throat nicknamed ‘razor blade throat.’ If you have this plus other cold-like symptoms, it could be Cicada. Buy a lateral flow test to check. There are no legal isolation rules, but you’re advised to stay home for five days if positive. Call 111 if you feel breathless or very unwell.
The COVID-19 virus hasn’t stopped evolving. The latest strain making its presence felt this spring is a sublineage of Omicron called BA.3.2. Health officials and scientists track its formal name, but the public and media have given it a nickname: Cicada. This isn’t because it makes a buzzing sound, but likely due to its sudden prevalence and persistent presence, much like the insects that emerge in large numbers.
As of April and moving into May 2026, Cicada has become the dominant strain circulating across the United Kingdom. It has been identified in at least 23 countries worldwide. Understanding its symptoms and the current guidance is key to managing your health and protecting others.
What the Cicada variant actually is (and why the name)
Scientists have noted it carries over 70 mutations in its spike protein—the part of the virus that helps it enter human cells. However, at this stage, there is no solid evidence to suggest it is inherently more severe or more easily spread than previous Omicron variants that have dominated in recent years.
Why this one feels different – the razor blade throat explained
Research Spotlight: Inflamed Pharyngeal Lymphoid Tissue
Medically, this isn’t caused by actual blades, but by inflammation. The virus targets the pharyngeal lymphoid tissue, which includes your tonsils and the back of your throat. This leads to severe inflammation and a hypersensitivity of the tonsillar pillars. The result is a level of pain that goes beyond the scratchy discomfort of a typical cold, feeling much sharper and more relentless. While alarming, it’s generally a sign of your immune system mounting a strong, localised response to the virus.
The full symptom picture in May 2026
The razor blade throat may be the headliner, but Cicada often comes with a full supporting cast of symptoms.
1. Throat & Sinus
- Severe ‘razor blade’ sore throat
- Significant sinus pressure
- Frontal headache
- Nasal congestion
2. Body & Energy
- Persistent cough
- Profound fatigue or low energy
- Mild fever or chills
- Post-viral slump (7-10 days)
3. Gastrointestinal
In about 20% of cases:
- Nausea
- Reduced appetite
- Diarrhoea
Is it COVID or just a bad cold? How to tell
Distinguishing Cicada from a common cold or seasonal flu can be tricky. Here’s a quick comparison:
| Feature | Cicada COVID-19 | Common Cold / Strep |
|---|---|---|
| Sore Throat | Severe, stabbing “razor blade” pain | Scratchy, mild to moderate |
| Cough & Congestion | Common combination | Cold: Yes. Strep: Rarely |
| Tonsils | Inflamed, but usually no white patches | Strep: Often white patches |
| Key Differentiator | Intensity of throat pain + systemic fatigue | More localized symptoms |
If in doubt, testing is the only way to know for sure.
Should you test? The 2026 LFT and PCR reality
If you develop symptoms like these, taking a test is a sensible step. However, the testing landscape has changed. Free lateral flow tests (LFTs) are no longer universally available from the NHS for most adults. You will need to purchase LFTs from a pharmacy or supermarket like Boots, Lloyds, or Tesco, typically costing between £1.50 and £3 per test.
PCR testing is now reserved for specific situations: people being admitted to hospital, those who are severely immunosuppressed, and during care home outbreaks. For the general public at home, an LFT is the appropriate tool.
Symptomatic relief that actually works at home
5 Tips for Managing Cicada at Home
- Alternate Pain Relief: Alternate paracetamol and ibuprofen every 3-4 hours if safe for you, for more consistent relief.
- Soothe the Throat: Use salt water gargles, throat lozenges with benzydamine (Difflam), and warm drinks with honey and lemon.
- Hydrate Relentlessly: Drink plenty of water, squash, or juice to stay hydrated.
- Prioritise Rest: Your body needs energy to fight the virus. Rest as much as possible to ease fatigue.
- Monitor Symptoms: Keep track of your fever and overall feeling. Note any signs that you need to escalate care.
When to call NHS 111 vs 999
Call 999 for Emergencies
- Severe breathlessness at rest
- Blue lips or face
- Confusion or inability to stay awake
- Not passing urine
Call NHS 111 for Advice
- Breathlessness during mild activity
- Persistent high fever >5 days
- Symptoms rapidly worsening
- You feel you need medical advice
Who should ask their GP about Paxlovid
For most healthy adults, COVID-19 is managed with rest and symptom relief. However, the antiviral treatment Paxlovid (nirmatrelvir/ritonavir) remains available on the NHS for those at highest risk of severe illness. This includes people who are immunosuppressed, those with certain cancers, recipients of solid organ transplants, and individuals with specific high-risk chronic conditions. The medication must be started within five days of symptom onset to be effective. If you are in a high-risk group and test positive, contact your GP or specialist team immediately.
Frequently Asked Questions
What is the razor blade throat symptom?
It refers to an exceptionally painful, stabbing sore throat that is a common and distinctive symptom of the Cicada variant. The pain is caused by intense inflammation of the lymphoid tissue at the back of the throat, making swallowing very uncomfortable. While alarming, it is not usually a sign of something more dangerous on its own.
Is the Cicada variant more dangerous than earlier COVID variants?
Current hospital data from the UK does not show evidence that Cicada causes more severe illness than previous Omicron variants. It has many mutations, but there is no proof it is more transmissible or deadly. The main risk remains for older adults and those with certain underlying health conditions, as with all recent variants.
Do I need to isolate if I test positive in 2026?
There is no legal requirement to isolate. However, official UK government guidance strongly encourages adults who test positive to stay at home and avoid contact with other people for five days. You should avoid contact with anyone who is vulnerable for ten days. This advice is to reduce spread, not a legal mandate.
Can I get a free COVID test in the UK now?
For most adults, no. Free lateral flow tests from the NHS ended for the general public some time ago. You can buy them from pharmacies and supermarkets. Free PCR tests are only available for specific clinical purposes, such as for hospital patients or in certain outbreak settings.
When should I worry about a sore throat and call NHS 111?
A sore throat alone, even a severe one, usually doesn’t require a call. You should contact NHS 111 if it’s accompanied by breathlessness on mild exertion, a high fever that persists for more than five days, or if your symptoms are rapidly worsening. Always call 999 for severe breathlessness at rest, confusion, or blue lips.
Verdict
The Cicada variant is a reminder that COVID-19 continues to evolve. Its painful ‘razor blade throat’ symptom is distinctive but manageable for most. If you develop symptoms, consider buying a test to confirm, rest at home, and use simple remedies to ease discomfort. Be mindful of those around you. Remember the clear danger signs that warrant a call to 111 or 999. For most, this will be an unpleasant but temporary illness.
Stay informed with other health updates: MHRA & NICE Aligned Approval Pathway | Managing Exhaustion & Recovery
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. It was published on 27 May 2026. Always consult with a qualified healthcare professional for diagnosis and treatment, or if you have any questions regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read here.
