A magnetic stimulation device for treatment of a patient using a time-varying magnetic field, wherein the magnetic stimulation device comprises: an energy source, a switching device, a magnetic field generating device, an energy storage device and a casing, wherein the magnetic field generating device is attached to the casing by at least one fastening point such that the magnetic field generating device is spaced apart from the casing in a distance of at least 0.1 mm, wherein the casing comprises an inlet located around at least a part of circumference of the magnetic field generating device, and a blower around circumference of the magnetic field generating device configured to provide an air into the casing such that the magnetic field generating device is cooled by the air, wherein the blower and/or the inlet are/is configured to direct the air in a direction parallel to a plane of the magnetic field generating device such that the air is directed along an upper side of the magnetic field generating device and along a lower side of the magnetic field generating device; the magnetic field generating device is connected to the energy storage device and to the switching device; the energy storage device is configured to be charged by the energy source; the switching device is configured to be switched in order to enable a discharge of energy from the energy storage device to the magnetic field generating device such that the magnetic field generating device generates an impulse of the time-varying magnetic field, wherein the impulse has an impulse duration in a range of more than 10 μs and less than 1 ms, a peak-to-peak magnetic flux density in a range of 0.2 Tesla to 7 Tesla on a surface of the magnetic field generating device, and a repetition rate in a range of 1 to 700 Hz; wherein the time-varying magnetic field comprises biphasic impulse; wherein the magnetic field generating device is flat; wherein the time-varying magnetic field is configured to be applied to a body region of the patient. an energy source, a switching device, a magnetic field generating device, an energy storage device and a casing, wherein the magnetic field generating device is attached to the casing by at least one fastening point such that the magnetic field generating device is spaced apart from the casing in a distance of at least 0.1 mm, wherein the casing comprises an inlet located around at least a part of circumference of the magnetic field generating device, and a blower around circumference of the magnetic field generating device configured to provide an air into the casing such that the magnetic field generating device is cooled by the air, wherein the blower and/or the inlet are/is configured to direct the air in a direction parallel to a plane of the magnetic field generating device such that the air is directed along an upper side of the magnetic field generating device and along a lower side of the magnetic field generating device; the magnetic field generating device is connected to the energy storage device and to the switching device; the energy storage device is configured to be charged by the energy source; the switching device is configured to be switched in order to enable a discharge of energy from the energy storage device to the magnetic field generating device such that the magnetic field generating device generates an impulse of the time-varying magnetic field, wherein the impulse has an impulse duration in a range of more than 10 μs and less than 1 ms, a peak-to-peak magnetic flux density in a range of 0.2 Tesla to 7 Tesla on a surface of the magnetic field generating device, and a repetition rate in a range of 1 to 700 Hz; wherein the time-varying magnetic field comprises biphasic impulse; wherein the magnetic field generating device is flat; wherein the time-varying magnetic field is configured to be applied to a body region of the patient.