Medical experts are urging the public to be aware of two night-time symptoms that could serve as early warning signs of cancer. Cancer Research UK has identified both persistent insomnia and drenching night sweats as potential indicators of the disease.
While many people experience these issues without having cancer—due to factors such as stress, room temperature, or other conditions—health professionals stress the importance of noticing unusual changes. The charity advises: "It's important to be aware of what is normal for you and speak to your doctor if you notice any unusual changes or something that won't go away."
Night sweats that are "very heavy, drenching" or accompanied by an unexplained high temperature warrant medical attention. Certain cancers, such as lymphoma, can directly cause excessive sweating, though it may also result from treatment side effects or infections.
Insomnia, defined as difficulty falling or staying asleep, affects one in three people at some point. Cancer Research UK notes it can be a sign of cancer, either due to other symptoms like pain or nausea, or as a side effect of treatment or anxiety following a diagnosis.
Other general cancer symptoms listed by the charity include unexplained lumps, persistent cough, changes in bowel habits, unexplained weight loss, and unusual bleeding. Anyone experiencing unexplained symptoms should consult their GP.
