A "very common" symptom that "doesn't go away" even with rest could be a warning sign of cancer. While this symptom typically affects 65 per cent of cancer patients, it could easily be overlooked or mistaken for something far less serious. Feeling slightly tired in the morning is perfectly normal. Even after a good night's sleep, you might still feel you need a bit more rest before starting your day. It's also typical to experience some tiredness during daytime hours, especially throughout the