Flu cases are on the rise earlier than expected this year, prompting NHS officials to caution about a looming “tidal wave of flu” that could overwhelm hospitals. A newly mutated strain is believed to be partially responsible for this concerning increase in cases. While most are familiar with common flu symptoms like a high fever, dry cough, and sore throat, there is another symptom that might be overlooked.

During the hectic holiday season, it’s easy to dismiss feeling unwell as mere stress. However, fatigue or exhaustion might actually indicate that your body is fighting a respiratory infection. It’s important not to ignore these signs as they could be indicative of flu.

The NHS notes that flu symptoms can appear suddenly and include:

• a sudden high temperature
• an aching body
• feeling tired or exhausted
• a dry cough
• a sore throat
• a headache
• difficulty sleeping
• loss of appetite
• diarrhoea or tummy pain
• feeling sick and being sick

In children, additional symptoms may include ear pain and a decrease in activity levels.

Most flu cases can be managed at home with rest, adequate sleep, staying warm, and taking pain relievers like paracetamol or ibuprofen. Pharmacists are also available to provide advice on treatments and flu relief options.

The NHS recommends seeking an urgent GP appointment if you are concerned about a child’s symptoms or if you are pregnant, over 65, have a chronic medical condition such as diabetes, a weakened immune system, or if symptoms persist beyond a week without improvement.

You should call 999 or head to A&E if you experience sudden chest pain, difficulty breathing, or start coughing up blood.

The NHS is expected to issue a stark warning about flu later today as figures show more than 1,700 people were being treated for the virus in hospital last week.

This is 56% higher than the number at the same time last year.

NHS Providers chief executive Daniel Elkeles, said: “The NHS is facing a tidal wave of flu. It’s very worrying to see the figures at a record high for the time of year — and still heading up.

“That’s alongside all the other winter bugs piling the pressure on the NHS.”