An inversion chair and the method of treatment are provided to assist a user in the treatment and prevention of migraine headaches by increasing and altering the blood flow within the head. The inversion chair includes a frame having a first and a second side connected to each other by a fixed backrest. The sides of the frame have L-shaped configurations comprising upstanding side and base sections that are connected by a curved member. A rotatable seat is positioned between the sides of the frame. The chair is adapted to transition between a standard sitting position to an inverted position. The chair comprises an upper user support bar and a lower leg support bar for maintaining a user within the chair during inverted use. The support bar is removable and used to either secure the lap of the individual when inverted, or support the chair when in an upright state.