In recent era, myofascial blocks are proving to be efficacious in relieving chronic pain conditions and post-operative pain relief. Ultrasonography, computed tomography, land mark techniques are being used for the same. The advantages of these techniques are that they are easy to perform with good analgesic effect and relatively safe. Key words: Erector Spinae Block, Computed Tomography, chronic pain, obesity Introduction : Forero et al. first described erector spinae plane (ESP) block in 2016 for the treatment of chronic thoracic neuropathic pain and postoperative pain in thoracic surgery. 1 The erector spinae muscle (ESM) is a complex formed by the spinalis, longissimus thoracis, and iliocostalis muscles that run vertically in the back. The ESP block is performed by depositing the local anesthetic (LA) in the fascial plane, deeper than the ESM at the tip of the transverse process of the vertebra.2 LA is distributed in the cranio-caudal fascial plane one dermatome a median of each 3.4 ml of injected volume.3 The diffusion of LA to the paravertebral space through the costotransverse foramina and the intertransverse complex (intertransverse and costotransverse ligaments: levators, rotators, and intercostal muscles) provides both visceral and somatic analgesia.2