These are called developmental problems.They usually come as a mixed picture and only a trained professional after assessing the child and getting medical history ruling out medical conditions can make diagnosis like Autism or Attention deficit Hyperactivity disorder or just plain speech delay with normal tantrum behaviour.
Next Steps
You may want to look for a place where a comprehensive assessment is done and then help with therapy
Health Tips
Not able to express can be frustrating.Help him to communicate and reduce situations where he feels not understood,