Treatment and Relief through Emerging and Accessible Therapy for PTSD Act or the TREAT PTSD Act This bill requires the Department of Veterans Affairs (VA) to furnish stellate ganglion block to certain veterans diagnosed with post-traumatic stress disorder (PTSD). Blocking the stellate ganglion (a group of nerves at the base of the neck) by injecting a local anesthetic is a treatment that may alleviate PTSD symptoms. The bill authorizes this treatment for any veteran who (1) is enrolled in the VA health care system, (2) has been diagnosed with PTSD, and (3) has elected to receive stellate ganglion block after being informed by a physician of the risks and benefits.