Decubitus ulcers, also known as pressure sores and pressure ulcers, are caused by long-term pressure on local tissues, mostly in bed-ridden people, especially the elderly. Decubitus ulcers occur at the site of long-term pressure, resulting in persistent localized ischemia and hypoxia, which can lead to necrosis. In mild cases, if the surface is slightly broken, disinfection with iodophor or ointment containing silver ions (with sterilizing effect), or the most commonly used mupirocin ointment can be used, and after topical application, pay attention to bandaging to ensure local cleanliness. After the ulcer has healed, drugs to promote blood circulation such as Xylitol polysulfate and sodium heparin ointment can be added. For severe decubitus ulcers, local debridement, sterilization and even surgery are required. If the ulcers are not debrided, excessive bacteria will colonize the surface and it will be difficult to heal. Regardless of the degree of decubitus ulcer, local pressure needs to be improved. For example, it is important to get out of bed and exercise properly. For patients who are paralyzed or must be bedridden for a long time, caregivers should help turn and pat their backs more often (every 1-2 hours) or use an air mattress. The diet should be supplemented with high-quality protein and dietary fiber, which are necessary materials for skin tissue repair, and no spicy and stimulating foods, etc. For mild cases of decubitus ulcers, only ointment can be applied. For severe cases, joint treatment such as surgical debridement is required, and in either case, getting rid of the causative agent is the key to treatment and prevention of recurrence.