The long-lamented Education Service Advisory Committee of the Health & Safety Commission listed the behavioural symptoms of Stress way back in 1998, and nothing much has changed.
Symptoms in Work Performance
Absenteeism
Poor timekeeping
Lack of concentration
Overworking
Failure to delegate
Unexpected difficulty with training
Drop in standards of performance
Symptoms in Interpersonal Relationships
Unusual tearfulness
Unusual irritability
Unusual aggression
Becoming withdrawn
Becoming argumentative
Becoming unsociable
Resentment of advice and constructive criticism
Reduced willingness to co-operate.
Symptoms in Personal Behaviour
Change in appetite
Change in personal appearance
Change in habits and behaviour
Increased use of coffee, cigarettes, alcohol