Experts are sounding the alarm over a lesser-known sign of a potentially fatal illness that might show up on your pillows and bedsheets when you awake. Extremely heavy night sweats leaving a mark might be an indicator of cancer.
Cancer red flags often vary depending on its location within the body. For example, if you have a persistent cough, it could suggest lung cancer, whilst finding blood in your stool may be a symptom of bowel cancer.
Some signs, however, are more generic and can be easily missed or misinterpreted, with night sweats being among them. It is quite common to sweat at night due to factors like room temperature or sharing a bed.
But regularly waking to find your bedding or yourself drenched in sweat could raise a flag for cancer, reports Surrey Live.
The NHS advises on this issue: “Most people sweat during the night. If you regularly wake up with soaking wet sheets you should get it checked by a GP. Night sweats are when you sweat so much that your night clothes and bedding are soaking wet, even though where you’re sleeping is cool.”
Cancer Research UK also notes that “very heavy night sweats” are a general sign of cancer, but reminds that it could alternatively stem from medication side effects or less grave health concerns.
The charity advises: “Sweating at night or having a high temperature (fever) can be caused by infections or a side effect of certain medications. It’s also often experienced by women around the time of the menopause. But speak to your doctor if you have very heavy, drenching night sweats, or an unexplained fever.”
The NHS further warns that some cancers, including leukaemia, can cause excessive sweating. Leukaemia Care reveals that about 30 per cent of patients with the disease experience night sweats as a symptom: “It is certainly not unusual to sweat during the night, especially in the summer when your room or bedding becomes too hot,” it says. “However, severe night sweats that occur to an extent that your bed sheets or pyjamas become soaking wet, despite sleeping in a cool environment, can sometimes be a sign of leukaemia.”
The organisation differentiates between regular night sweats and those caused by cancer.
“You regularly have night sweats that wake you up at night – you may wake up drenched in sweat, unable to cool down even if your room is cool,” Leukaemia Care adds. “Many describe the feeling as if they had just got out of a swimming pool and laid down in bed.”