Hip surgery is a common orthopedic emergency among the elderly. The trauma after hip-related procedures is large and poorly treated pain is associated with negative clinical outcomes such as longer postoperative length of stay and higher mortality rates, particularly among older patients. Nerve block techniques have been used to manage postoperative pain. Pericapsular nerve block (PENG block), a new regional block technology proposed in recent years, has been used to relieve pain after hip-related procedures and other procedures. The PENG block has some advantages compared to previous nerve block, including a lack of motor block, precise positioning, fast onset and effectively relieving pain without weakening muscle strength. In recent years, the understanding of the innervation of the hip joint, the anatomical structure of the surrounding tissue and the anatomical characteristics through ultrasound has gradually increased, and the PENG block has been widely used. At present, its applications are expanding and more attention should be paid to the concomitant potential complications.