My 4-year-old Cousin was diagnosed with SPD earlier this year , as well as ADHd. He is seeing a psych, and an OT,and for a while his behavior was better , however recently he has started throwing things, biting, and has even resorted to going to the bathroom in his bedroom when he is upset. I babysit him often and my aunt doesn't know what to do anymore. She is a single parent , so it is very hard for her to deal with these sorts of tantrums. Any advice for how to control these tantrums and how to prevent them from happening?