I agree with Wayne. ALL people on steriods have some anger issues at times. BUT also there could be every day stuff going on in their lives that can affect them. My suggestion is to check her levels. See how they are. Then check what is going on around her. When did she have surgery? Consider this. After any stress dosing, especially after a surgery, their levels can be SO off. My daughter who is now almost 8, and has swcah, really went through some emotional rollercoasters after we stressed dosed her. This was like a good full stress dosing for a bad virus, or some kind of surgery. My daughter had genital surgery as an infant so we didn’t see any kind of reaction to stress dosing then. But when she had her adenoids removed we had some emotions going on a few days later. That stress dosing can wreck havoc on some emotions. Especially when they are younger and cannot express their feelings any other way then hitting. I remember my daughter went from lashing out to sobbing those days. I would just remind her that hitting was NOT nice and NOT allowed. I hold her to her limits, but would show a lot of love and patience then. I would say, "I know you don’t feel good", and just rock her if she would let me then. It was so sad to see her go through this steriod high. Also if you stressed dose that much for a surgery, you should have received instructions to wein her down to her normal dose of steriods. I have read from adults here that many like to wein down after a high dose of their meds. because if they don’t they get head aches and don’t feel right.

ALSO, big note here too. My daughter had a first grade teacher that was I swear a living Saint. We would always talk in length about children and how they behave. She said that at different stages of their lives, they will act out. Not always in anger, sometime in tears, sometimes in anger. Starting kindergarten next year may have an impact on her. If she over hears you talking about it and it is not positive, she will react to that. You may never know what they are listening to. OR look for changes around her. It could be subtle changes that have occurred. To you it may have been not obvious, to a five year old it could be the world. Take one day at a time. Love her and be patient with her, but hold her to her actions. Talk to her and ask her what is bothering her. If it continues and you can’t find the culprit, take her to a pediatric counselor to get to the bottom of it.