Dollmaker- I was 9yrs old when the doctors noticed I had Gilberts Disease. I am now 22yrs old and still show signs of yellowish eyes and skin and serious fatigue from time to time. Caffine and not enough fluids or sunlight seem to make it worse. I have been to a few doctors and all have recommended 10min. in the sun a day (or even a tanning bed works too)and PLENTY of water. A level 3 is not real bad they can reach up to 12 and 14....which at that point you'd notice other symptoms too: like confusion and forgetting things. Your son may be lucky...most people never even witness any symptoms. I hope this helps. If you gave anymore ?'s feel free to ask. ~ashtonT04~