Clean up the red and swollen skin and the hair around the wound, and try to cut as much as possible. Then rinse repeatedly with cold boiled water and salt, and scrub with cotton swab until the wound is clean and free of foreign bodies. Then apply some antibiotic ointment, such as broad-spectrum antibacterial drugs such as Baiduobang. After that, we must pay attention to prevent the wound from contacting foreign bodies and water. It will take some time to recover.