Symptoms of cancer patients before dying have individual differences, and may include unstable vital signs, abnormal mental and emotional state, or systemic symptoms. 1. Symptoms of unstable vital signs: one hour before the death of a cancer patient, the blood pressure may drop, and there may be pale and cold limbs, etc. The patient may also be drowsy or even comatose. Difficulty in breathing, deep and fast breathing, and then shallow and fast breathing, and finally respiratory arrest may occur. Cyanosis and florid spots may appear at the ends of the limbs. 2. Mental-emotional abnormalities: the patient may be delirious, with irritability, constant moaning and babbling. 3. Systemic symptoms: cancer is a consumptive disease, malaise, generalized swelling, high fever, etc. may appear. Early treatment of cancer can improve the prognosis to the greatest extent. Even in advanced stages, patients should actively cooperate with doctors, keep a good mindset, and actively improve the quality of life in order to improve the survival period.