Physiological saline is a 0.9% sodium chloride solution, which is close to the blood concentration of the human body. Clinically, physiological saline local wet compresses have the following roles: First, for patients with dry facial skin, physiological saline gauze can be applied through local wet compresses to keep the moisture of the face to avoid loss, which can remove greasy dirt from the face and avoid the formation of facial wrinkles, with certain anti-aging effects. Second, when the patient’s wound is accompanied by more secretions, saline cotton balls can be used to scrub and saline gauze can be used for local wet dressing, which can maintain a moist environment within the wound, inhibit bacterial reproduction and promote faster growth of granulation tissue. Third, warm saline gauze is used to externally dress the exposed intestinal canal during surgery, which can maintain the normal activity of the intestinal canal and avoid spasmodic contraction of the intestinal canal with lower temperature.