If the child wants to pretend sick in order not to go to the exam or for some important reason, of course.
But if a child wants to pretend sick simply because he likes to get sick, likes to drink a delicious syrup, doesn’t eat his favorite soup, and generally get attention and care in all forms, then discomfort treatment will be impossible.

Well, if your children receive attention, care and favorite food exclusively during illnesses - they will still get sick, regardless of the degree of abomination of drugs. Psychiatry you know.