A cold, also known as an upper respiratory tract infection, commonly occurs in patients due to a decrease in immune function, exposure to cold, or being infected by other viral colds. Typical symptoms in these patients include nasal congestion, runny nose, sneezing, and may also include an itchy throat and cough. For cold patients with strong resistance to viral infections, medication may not even be necessary as the cold can completely heal on its own. It is advised that these patients drink more hot water, which can help not only by providing hydration but also can serve to reduce fever in patients with mild fevers. Drinking more water can improve symptoms like nasal congestion and also accelerate the recovery from a cold, as increased water intake boosts metabolism. Therefore, for patients with lowered immune function and viral infections, it is recommended to drink an adequate amount of hot water.