I've treated a number of clients with this condition and they have all responded well, each to a greater or lesser extent. Aromababe is right, massage is key here over the reflexology treatment itself, as it will help to relieve localised pain and get things moving. If you are familiar with any mobilisation techniques, these will be of particular use to you. It can be a slow process, but also very worth it. He may already be under his GP for this, but as suggested may also need to see a podatrist. I know some people have responded well to orthotics in these situations.