Effects can be physical, mental or more often a combination of the two.
Jane, for example, is a 13-year-old, female, showing changes in weight, complaints of feeling ill, isolation from peers, defiance, irritability, lack of interest, poor time management, and follow-through.
Other effects often appear as the following:
Complaints of feeling sick, school absence, lack of participation, sleepiness,
Isolation from peers, problems with social skills, defiance
Difficulty concentrating on tasks/activities
Poor work completion
Forgetting to complete assignments, difficulty concentrating
Difficulties with planning, organizing, and executing tasks
Refusing to complete work, missing deadlines
Facial expressions or body language indicating depression or sadness
Easily hurt feelings, crying, anger
Poor performance and follow-through on tasks
Separation anxiety from parents or caregiver
(Crundwel & Killu, 2010)