🗓️ On Instagram, @calmadhdparenting shares six bedtime tips for children with ADHD, as 75% face sleep issues, according to University Hospital Southampton. Sleep is something we find really difficult in our house, particularly for my 8-year-old daughter, who is waiting for an ADHD assessment. Why can sleep be difficult for children with ADHD? Researchers at University Hospital Southampton say almost three-quarters of children with ADHD experience sleep problems. Neither my sister nor I has ADHD, but Mum was convinced that changed routines meant we needed extra help settling.