You said that your child has temper tantrums once in a while. When upset, s/he may do things like pound his/her fists, scream, hit objects, or slam doors. Many of these behaviors are common in children your child's age.
Warning signs that his/her behavior may be getting worse include:
If you think these are getting worse talk to your child's doctor, even if you have discussed these things before.
Adapted in part from the American Academy of Pediatrics (AAP) Diagnostic and Statistical Manual for Primary Care (DSM-PC) (1996).