I'm concerned about my stepson. We have it every other weekend and 9 times out of 10 he's been unwell for some reason or the he's injured himself. I understand 3 year olds get unwell. I have a 4 year old myself - he rarely gets unwell. Should I be concerned that his mother isn't caring for him properly or am I being too sensitive. We unfortunately don't have any contact with mum due to a few reasons. But I am concerned something may be underlying or something is happening at home.