Children who suffer selective mutism may appear: Shy, socially awkward, anxious, insecure and clingy, embarrassed, rude, indifferent or aloof, stiff or tense, avoids eye contact, remains expressionless, and or motionless. However, with family or other close relationships, the child may be angry and aggressive. Some will use hand gestures to communicate. With the prospect of a social event or even while preparing for school, kids with selective mutism may suffer stomachaches and headaches, or feel nauseous or suffer diarrhea.