Why would a type 2 who keeps his blood sugar consistently below 7 by eating LCHF start having headaches. These have worsened as the months have passed and now it is a constant dull ache - day and night. His doc has prescribed 8 x 5mg tablets of Prednisolone (which is a steroid) per day (to be taken with breakfast) but after a week on these things he's still feeling rough and totally washed out. He's 77 but usually very active and fit, now he's tired and frankly looks dreadful. He's also taking 5mg metformin.