While the NHS lists three main symptoms of Covid there are numerous others that could also be a sign of the disease.
They range from common symptoms a person may experience while ill, such as headaches to loss of appetite, as well as more extreme symptoms such as diarrhoea, vomiting and skin and mouth issues.
The US officially recognises a wide range of symptoms of coronavirus while sufferers have reported their own variants of how they reacted to the disease.
Here is a complete list of the symptoms sufferers have reported and the ones officially recognised, as reported by Wales Online.
Three main Covid symptoms listed by the NHS
1. A high temperature
If you feel hot to touch on your chest or back (you do not need to measure your temperature).
2. A new continuous cough
If you are coughing a lot for more than an hour, or three or more coughing episodes in 24 hours (if you usually suffer with a cough, it may be worse than usual).
3. A loss or change to your sense of smell or taste
If you have noticed you cannot smell or taste anything or things smell or taste different to the way they normally do.
Symptoms officially recognised in the US
A headache is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
According to researchers at Zoe Symptom Study, headaches are one of the earliest signs of Covid and more common than the classic symptoms of a cough, fever and loss of smell.
However, headaches are generally very common and most people with a headache will not have Covid.
5. Shortness of breath or difficulty breathing
Shortness of breath or difficulty breathing is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
Millions of people reported to the Zoe Symptom Study that they experienced a shortness of breath.
Fatigue is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
According to researchers at Zoe Symptom Study, fatigue is one of the early signs of the disease. It is not the same feeling as tiredness, more an extreme form of feeling “wiped out” that persists despite a good night sleep.
It may make it difficult to walk up stairs, do normal chores or even get out of bed. It can also make it hard to concentrate on things. Some people have described it as “brain fog”.
7. Muscle or body aches
Muscle or body aches is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
Muscle pain has been found as a possible symptom of Covid -19 by researchers at Zoe Symptom Study.
Covid-related muscle pains can range from being mild to quite debilitating, especially when they occur alongside fatigue. For some people this muscle pain stops them from doing day-to-day tasks.
8. Sort throat
A sore throat is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
Data from Zoe Covid symptom study app, looking at reported symptoms of those in the UK, has shown that a sore throat can be a symptom of Covid.
It is a lesser known symptom, and often an early sign of the disease more common in children and adults up to the age of 65.
9. Congestion or runny nose
Congestion or runny nose is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
10. Nausea or vomiting
Nausea or vomiting is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
Diarrhoea is recognised as an official symptom by the Centre for Disease Control and Prevention in the USA.
Zoe researchers found that diarrhoea can be a symptom of Covid and affects a reasonable proportion of people with the illness.
Having COVID-19 diarrhoea alongside many other symptoms is associated with an increased risk of needing hospital support.
Diarrhoea caused by COVID-19 is similar to the upset tummy you might get from a regular stomach bug, such as rotavirus or norovirus. Diarrhoea is common in children and adults and usually clears up by itself.
Researchers think Covid causes diarrhoea because the virus can invade cells in the gut and disrupt its normal function.
Reported but not officially confirmed
12. Skin rash (Covid fingers and toes)
Data from Zoe Covid symptom study app, looking at reported symptoms of those in the UK, suggests that some people who suffered with Covid-19 saw changes to the skin on their fingers and toes.
It is not clear what causes these changes but could be linked to the immune response to the virus.
The rashes are usually itchy and may make it difficult to sleep.
13. Covid tongue
Some people are reporting to the Zoe Covid app changes to their mouth and tongue. These include mouth ulcers and their tongue appearing coated or patchy.
Other changes include having a dry mouth and fungal infections as well as pain or muscle aches while chewing.
14. Hoarse voice
People reported to the Zoe Covid study app that they experienced changes to their voice which affected the sound of their speech.
A hoarse voice isn’t a very common symptom of Covid-19; however, during the beginning of the pandemic lots of clinical staff reported experiencing a hoarse voice during their illness.
A hoarse voice can sound, and feel, different from person to person. For example, your voice might become more croaky, raspy, or rough, quieter or even change in pitch. If you have a hoarse voice, you might feel like it requires more effort to speak.
15. Chest pain
A small amount of people using the Zoe Symptom app experienced significant chest pains, but it is important to remember chest pains can be a sign of something seriously wrong, like a heart attack of blood clot in the lung.
While it is rare, people with Covid who experience chest pains have a higher risk of needing hospital support, especially if the chest pain is alongside confusion or shortness of breath.
16. Abdominal pains
According to Zoe researchers, abdominal pains are a fairly rare symptom of Covid but could be a generalised pain around the middle of your belly.
17. Loss of appetite
A loss of appetite could be a symptom of Covid, according to Zoe researchers.
Researchers say that skipping meals was first spotted in care homes, carers noticed residents were off their food during their illness.
A loss of appetite is a normal part of being unwell and can be caused by feeling too sick or tired to eat a meal.
Delirium is an important symptom of Covid-19 in elderly people, according to Zoe researchers.
There are two types, hyperactive delirium, where someone abruptly changes their character and starts acting strangely, they could become agitated or distressed and even aggressive.
The second type is hypoactive delirium, which is more common and harder to spot.
People with hypoactive delirium become withdrawn and less responsive or engaged in what’s going on around them, and sometimes drowsy.