Fever can be serious when taking a cold bath. On the one hand, a fever patient taking a cold bath can interfere with the body’s hypothalamic thermoregulatory center, and on the other hand, it can stimulate the capillary constriction around the skin, causing the body’s temperature to continue to rise. When a fever patient takes a cold bath, the body’s resistance is weakened and the defense function is poor, so if invaded by bacteria or viruses and other pathogenic microorganisms, it can easily lead to serious infection and cause disease. Therefore, patients with fever should not take cold baths, and it is recommended to take warm baths, while at room temperature. In addition, it is important to drink more water to avoid the possibility of losing too much body fluid after bathing leading to deficiency.