Erin McGregor ended up having to endure a "rough evening and night" in Tallaght Hospital this week after her son Harry became unwell.
Taking to Instagram, Erin shared her stressful ordeal with her followers, saying that the night was "the parts of autism I dread & hate".
As six-year-old Harry is non-verbal and has sensory issues, it can be difficult to know the extent of his illness and what is making him feel sick.
