text: can watching too much tv cause persistent headaches in a child? my son has had a headache for a week and the doctors say it is a sore throat....he is on meds but not working very well. 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. many things can cause a headache such as chemical sensitivity such as cleaners and decorating; eye strain, viruses, tiredness, dehydration, stress, noise.