Expert warns never to ignore common summer problem - it can be a 'hidden' cancer warning sign
Dr Suhail Hussain, a private GP, urged people to pay attention to night sweats, which can be more than just a result of warm weather.
In some cases, he said, they may signal serious underlying conditions such as leukaemia or lymphoma.
'Night sweats are a common phenomenon, and one that's far more likely to occur on hot, sticky nights,' Dr Hussain explained.
'But persistent or unexplained sweating during sleep shouldn't be ignored—particularly if it happens alongside other symptoms like weight loss or fatigue.'
With temperatures forecast to rise across the UK in the coming days, many people will experience disrupted sleep and wake up with sweat-soaked sheets.
But Dr Hussain said it's important not to dismiss the symptom outright, especially if it continues once the weather cools.
'The occurrence of such symptoms should not merely be dismissed as 'oh well it's just hot outside'.
Speaking to The Express Dr Suhail Hussain added: 'Night sweats can be a sign of something more serious, such as a serious infection, the menopause—or even cancer.
'Sweats associated with cancer are normally drenching—literally. You can wake up with your pyjamas and bed sheets wringing wet with sweat.'
If night sweats occur alongside other symptoms—such as fatigue, unexplained bruising, pain, flushed skin, palpitations, or aching joints and muscles—it's a particular cause for concern, Dr Hussain said.
Sweating throughout the day, regardless of temperature or exertion, is another red flag.
Swollen lymph nodes in the neck, groin or abdomen can also point to blood cancers like leukaemia or lymphoma.
These glands help filter infection, and swelling may signal the body is fighting something more serious.
And, when cancerous cells break away from a tumour, they can become stuck in nearby lymph nodes, causing them to swell.
'Other rare cancers can also cause sweating, 'Dr Hussain added.
'A group of cancers known as carcinoids affect hormonal function vie the neuroendocrine system, and hence may result in excess sweating.'
The neuroendocrine system is made up of nerve pathways and neuroendocrine cells—specialised cells that receive signals from the nervous system and release hormones into the bloodstream.
These hormones regulate essential functions such as growth, metabolism, and development.
When cancer arises in these cells, it can alter how they grow and function, often leading to excess hormone production and abnormal cell proliferation.
Dr Hussain cautioned: 'The bottom line is that if you feel like sweaty Betty or perspiring Pete and it's going on a bit too long, then head over to your GP and get it checked out.'
This warning comes as a young woman was diagnosed with blood cancer after putting down her itchy skin and night sweats to grief and anxiety, after losing her dad to colon cancer last year.
After experiencing two other worrying symptoms, chest pain and fatigue, Marly Garnreiter, 27, went to her GP for answers.
Her scans revealed a 'big mass' on her left lung and she was subsequently diagnosed with Hodgkin lymphoma—a deadly type of blood cancer.
Around 2,200 people are diagnosed with Hodgkin lymphoma in the UK each year, according to Cancer research UK.
It is a rare type of blood cancer that develops in the lymphatic system, which is a network of vessels and glands spread throughout the body that are responsible for getting rid of waste and fighting infections.
In Hodgkin lymphoma, the cells within this system develop abnormally and form swellings near the lymph glands, such as in the neck, armpit and groin.
The damaged cells also lose their infection-fighting properties, making patients more vulnerable to infection.
Hodgkin lymphoma can develop at any age, but it mostly affects men between 20 and 40 years of age and those over 75.
Symptoms of Hodgkin lymphoma can vary widely, as not all patients will develop obvious swellings or growths.
Night sweats, unintentional weight loss, a high temperature, persistent cough and itchy skin are all other, lesser-known symptoms.
For some patients, the collection of abnormal cells happens in the abdomen, inside the body, leading to digestive symptoms like indigestion and abdominal pain.
Persistent tiredness and excessive bleeding can also be signs, as can pain in the lymph glands after drinking alcohol.
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