What's the best remedy for lordosis? Thanks!

Variable. Lordosis is the normal curvature of your spine in the cervical and lumbar region. If you have an increase in this then the etiology needs to be addressed and X-rays should be obtained. If it is not structural then the this may be your normal curvature and exercising and CORE exercises would be of value. If it is related to a structural issue then other options would need to be explored.