It depends on the person! If they are handicapped they may face physical challenges (example) stairs for someone in a wheelchair. Someone sitting in a long lecture when they have ADD. Anything really
Children who have been subjected to trafficking may experience a number of things such as: feeling withdrawn or isolated from society, they could experience addiction, eating disorders, they may develop anxiety, nightmares and sleeping problems; depression and suicidal thoughts could also be other problems faced by children after these experiences.