In what cases it is worth contacting a psychologist

Many parents often ask themselves: whether the baby needs a psychologist, and in what cases to contact a specialist?. The fact is that there is no unequivocal answer to this question, but if you think that your child behaves somehow wrong, for example, it is constantly in a bad mood, there are often outbreaks of aggression, and you cannot do this problem yourself , then it is worth using the help of a child psychologist.