Provided are methods for treating various spondyloarthritic and psoriatic conditions, including types of axial spondyloarthritis (axSpA), psoriatic arthritis (PsA), and psoriasis (PsO), with the JAK1 inhibitor, upadacitinib free base or pharmaceutically acceptable salt thereof. In various aspects, provided are methods for treating active non-radiographic axSpA (nr-axSpA), methods for treating active ankylosing spondylitis (AS), methods for treating active psoriatic arthritis (PsA), and methods for treating active psoriasis (PsO).