Seth has only had more than trace or small ketones twice. Tonight his ketones went up to 2.0 on the meter. I'm wondering what came first, the chicken or the egg if you know what I mean? While having ketones he... Had a BAD headache, really bad. Felt like he had a fever. (Had goose bumps) Seth is NEVER cold. Got sick once. Once I got he ketones to .5 His head felt a lot better and the other symptoms went away.. How does your child feel with ketones?