Health experts have warned that profuse night sweats, which leave visible marks on pillows and bedding, could be an early sign of cancer. While occasional sweating during sleep is normal, regularly waking up with soaking wet sheets may indicate a serious underlying condition.
The NHS advises that anyone experiencing night sweats so severe that their night clothes and bedding are drenched, even in a cool sleeping environment, should consult a GP. Cancer Research UK lists very heavy night sweats among general cancer symptoms, though they can also result from infections, medication side effects, or menopause.
Leukaemia Care notes that approximately 30% of people diagnosed with leukaemia experience night-time perspiration. The charity describes the sensation as feeling like “you had just got out of a swimming pool and laid down in bed.” Other cancers linked to excessive sweating include lymphoma, bone cancer, and liver cancer.
The NHS emphasises that night sweats accompanied by unexplained weight loss warrant prompt medical attention. While most cases are not cancer, ruling out serious causes is essential.
