he needs to see a neurologist. they will not cure his stubborness however but they may be able to determine the cause of his symptoms and perhap find a solution. it is interesting that you used the term "penalty of death" since these symptoms could indeed be serious and his failure to take care of himself by seeing a specialist could have dire consequences.
my husband 31years old (230lbs) who under penalty of death will not see a doctor has had blackout/ fainting spells. ever since he was in a near fatal car accident his head broke the steering wheel and was split open with cooncussion. his symptoms are first throbbing headache at back right of head then minutes later goes pale/ grey colored on his whole body hears ringing in his ears left leg becomes twitchy passes out for aprox 1min. are these things related to car accident trauma or otherwise?