text: TV is not the cause of headaches but flickering images on the screen might cause problems with migrane and epileptic sufferers. A headache for a week is not a long time and certainly not to overly worry about. People at times do get headaches it is a normal part of life.\nMany things can cause a headache such as chemical sensitivity such as cleaners and decorating; Eye strain, viruses, tiredness, dehydration, stress, noise.