My son (10) has been feeling sick a lot over the last few weeks with some leg pain in between these episodes he’s fine we’ll the last 2 days he’s been on the sofa feeling sick to his stomach so I dipped his urine to check for anything abnormal and he had high ketones I freaked out and popped to a&e were they pricked his finger to check for diabetes which thankfully was normal so doctor said take him to gp for a blood test, well today he’s eaten and drank plenty and he still has high ketones, what would cause this? Waiting on docs appointment but worried