My Son Has Gullian Barre Disease But Lately At The

My son has Gullian Barre disease but lately at the of 20 he has had a couple episodes when his eyes get more yellow then usual and he gets sweaty and feels faint. He was diagnoised with Hep A a couple months ago and really hasn't followed thru so I guess I'm wondering what I can suggest to him to motivate him to follow up with a specialist. Thanks