Whether a three-day cold and fever is dangerous depends mainly on the severity of the illness and the patient’s own physical condition. For patients without underlying diseases and with good general health, there is usually no danger, but if the general health is poor and combined with underlying diseases, there may be danger.
For adults with normal immunity and no underlying disease, if the fever is around 38℃, and the patient’s mental state is relatively good, diet and sleep are OK, this is generally not dangerous.
However, if the temperature exceeds 38.5℃ for three days, physical cooling cannot improve the fever, and the symptoms gradually worsen, the patient should be sent to the hospital for treatment in time to avoid danger.
As for the elderly with low immunity or patients with chronic cardiac or pulmonary insufficiency, having a cold and fever for three days is also dangerous, and you need to go to the hospital in time, under the guidance of a professional doctor for treatment.