COVID Symptoms 2025: What You Need to Know About the Latest Variants

COVID-19 is an infectious illness caused by the SARS-CoV-2 virus. Most people who catch it experience mild to moderate respiratory symptoms and recover at home without special treatment. Some people, however, become seriously ill and need hospital care. Knowing the symptoms — and knowing which ones are warning signs — helps you act early and protect the people around you.

The virus has continued to change over time. Omicron sub-lineages have continued to circulate through 2025–26; symptoms remain broadly similar to those seen in recent years, and no single symptom on its own confirms the illness. Because COVID-19 can look very much like a cold or flu, testing is the only reliable way to know which illness you have. If you want the short version in table form, see our COVID symptoms chart comparing COVID-19, cold and flu.

The most common symptoms

According to the World Health Organization (WHO), the most common symptoms of COVID-19 are:

• Fever
• Cough
• Tiredness (fatigue)
• Loss of taste or smell

Other symptoms that can occur are:

• Sore throat
• Headache
• Aches and pains
• Diarrhoea
• A rash on the skin, or discolouration of fingers or toes
• Red or irritated eyes

Not everyone gets every symptom. Some people have only one or two mild symptoms, some feel quite unwell for several days, and some people who are infected have no symptoms at all but can still pass the virus to others. Symptoms can appear anywhere from about two days to 14 days after exposure — most often around five to six days.

Symptoms by group

Respiratory symptoms

A cough is one of the hallmark symptoms, along with a sore throat and a runny or blocked nose in many cases. These upper-airway symptoms are a big reason COVID-19 is so often confused with a common cold. The symptom that should never be ignored is breathlessness: difficulty breathing or shortness of breath is a serious sign and needs immediate medical care (see the red-flag section below).

Whole-body symptoms

Fever or chills, tiredness, headache and muscle or body aches are very common in the first days of illness. The tiredness in particular can be strong — many people find that even small tasks feel exhausting — and it can linger for some days after the other symptoms ease. Rest is genuinely part of the treatment: pushing through tends to prolong recovery.

Digestive symptoms

COVID-19 can also affect the stomach and gut. Diarrhoea is a recognised symptom, and some people experience nausea or a reduced appetite. If you have digestive symptoms, drink fluids regularly to avoid dehydration, especially if you also have a fever.

Taste, smell, eyes and skin

A new loss of taste or smell was one of the most distinctive symptoms in the early years of the pandemic. It is reported less often now than it was then, but it still occurs and — because colds and flu cause it far less often — it remains a useful clue. Red or irritated eyes and skin rashes are also reported in some cases.

How symptoms have changed over time

In 2020, the illness caused by the original virus often presented with high fever, a dry cough and a marked loss of taste and smell, and severe breathing problems were more common. As the virus evolved and population immunity grew through vaccination and previous infections, the typical picture shifted: illness caused by Omicron and its sub-lineages has more often centred on the upper airways — sore throat, cough, congestion and headache — and has generally been milder for most people. That said, “milder for most” does not mean harmless. Older adults and people with underlying health conditions can still become seriously ill, which is why the warning signs below matter.

COVID-19, cold or flu?

The symptoms of COVID-19, the common cold and flu overlap heavily, and even doctors cannot reliably separate them without a test. As a rough guide: a cold is usually mild and gradual, centred on a blocked or runny nose and sneezing; flu tends to arrive suddenly with high fever, strong body aches and exhaustion; COVID-19 sits somewhere between the two and is the one most associated with loss of taste or smell. Our COVID symptoms comparison chart sets the three illnesses side by side.

When to seek medical care — red-flag symptoms

Most people can recover safely at home. But some symptoms are serious warning signs. Seek medical care immediately if you develop:

• Difficulty breathing or shortness of breath
• Chest pain
• Confusion, or unusual difficulty staying awake
• Loss of speech or mobility

Do not wait to see whether these improve on their own — contact a doctor, go to a hospital, or call your local emergency number. You should also seek medical advice promptly if your symptoms keep worsening after several days, if a fever does not settle, or if you are in a higher-risk group (see below) and have just become unwell, because early treatment decisions can matter.

Who is at higher risk of severe illness?

Anyone can catch COVID-19, but some people are more likely to become seriously ill:

• Older adults
• People with underlying conditions such as diabetes, chronic heart or lung disease, or kidney disease
• People with weakened immune systems
• Pregnant women

If you are in one of these groups, take symptoms seriously from day one: get tested early, keep your doctor informed, and do not hesitate to seek care if anything feels different from an ordinary cold — particularly any change in your breathing.

What to do if you have symptoms

1. Get tested if you can, especially if you live with or will be around someone at higher risk.
2. Rest and stay home while you are unwell, as much as your situation allows. This speeds your recovery and reduces the chance of passing the virus on.
3. Drink fluids regularly, especially if you have fever or diarrhoea.
4. Watch your symptoms. If breathing becomes difficult or any red-flag symptom appears, seek care immediately.
5. Keep distance within the home where possible — a separate room and good ventilation help protect family members.
6. Follow local guidance and your doctor’s advice on vaccination, isolation periods and treatment; recommendations are updated as evidence changes.

Symptoms that linger

Some people continue to have symptoms for weeks or longer after the initial illness — often called long COVID or post-COVID condition. Commonly reported lingering problems include tiredness, breathlessness, and difficulties with concentration or memory (often described as “brain fog”), along with mood and sleep changes. If symptoms are not improving, or are affecting your daily life, discuss them with your doctor rather than simply waiting them out; support and follow-up care exist, and other causes may also need to be ruled out.

Reducing your risk

Simple habits still make a difference: stay up to date with vaccination as advised by your local health authorities, wash hands regularly, cover coughs and sneezes, improve ventilation by opening windows where practical, and stay home when you are unwell. These steps reduce spread not only of COVID-19 but of flu and other respiratory infections too.

Conclusion

The core symptom picture of COVID-19 is stable and worth knowing by heart: fever, cough, tiredness and loss of taste or smell are the most common symptoms; sore throat, headache, aches and pains, diarrhoea, skin rash and red or irritated eyes can also occur; and difficulty breathing, chest pain, confusion or loss of speech or mobility are emergencies. Test when you are unwell, rest at home, and act quickly on the warning signs — especially if you or someone in your family is at higher risk.

FAQs about COVID-19 symptoms

1. Q: What are the most common symptoms of COVID-19?
   A: Fever, cough, tiredness, and loss of taste or smell, per WHO. Sore throat, headache, aches and pains, diarrhoea, skin rash and red or irritated eyes can also occur.
2. Q: How quickly do symptoms appear after infection?
   A: Symptoms can start anywhere from about two days to 14 days after exposure, most often around five to six days.
3. Q: How long does the illness usually last?
   A: For mild cases, most people feel better within one to two weeks, although tiredness can take longer to settle. Severe cases need hospital care and take longer.
4. Q: Is loss of taste and smell still a symptom?
   A: Yes, it still occurs, though it is reported less often than in the first years of the pandemic.
5. Q: How can I tell COVID-19 from a cold or flu?
   A: The symptoms overlap too much to be sure without testing. Loss of taste or smell points towards COVID-19; a sudden high fever with strong aches is typical of flu; colds are usually milder. See our comparison chart for the side-by-side picture.
6. Q: Can I have COVID-19 without symptoms?
   A: Yes. Some people have no symptoms or only very mild ones, but can still pass the virus to others.
7. Q: When should I go to a hospital?
   A: Immediately, if you have difficulty breathing or shortness of breath, chest pain, confusion, or loss of speech or mobility.
8. Q: Should I exercise while I have COVID-19?
   A: No — rest while you are unwell, and return to exercise gradually once symptoms have settled. If you had chest pain or breathlessness, speak to a doctor before training again.

Sources

• Healthy diet — WHO fact sheet
• USDA FoodData Central
• Exercise and Physical Fitness — MedlinePlus
• Coronavirus disease (COVID-19) — WHO fact sheet
• COVID-19 (Coronavirus Disease 2019) — MedlinePlus

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By the FitNTip Editorial Team · Last updated: 4 November 2026

How FitNTip builds its guides: our articles are compiled from official public sources — including the Indian Food Composition Tables (ICMR–National Institute of Nutrition), USDA FoodData Central and the WHO healthy diet guidance — and reviewed against them when updated.

This article is educational and is not medical advice. If you have a medical condition, are pregnant, or plan a major change in diet or training, talk to your doctor first.