Common symptoms of depression include irritability, feelings of guilt, fatigue, a loss of interest in hobbies, and feelings of hopelessness, according to the National Institute of Mental Health. Insomnia, consistent feelings of anxiety, difficulty concentrating, suicidal thoughts and significant changes in eating habits are other symptoms that usually occur with people suffering from depressive illnesses. While the frequency and severity of these symptoms vary, many people with depression do not experience the same symptoms.
Children and adolescents with depression experience many of the common symptoms of depression found in adults, but there are some notable differences, according to Mayo Clinic. Younger children can exhibit clinginess, unexplained pains and aches, weight loss, excessive worrying and a refusal to attend school. Teenagers with depression are prone to self-harm, lash out in anger, have poor attendance and performance at school, excessively use drugs or alcohol, and avoid social interaction. Children who have attention deficit hyperactivity disorder can also suffer from major depression, but they tend to demonstrate restlessness without sadness or loss of interest in hobbies.
Many older adults suffer from clinical depression, and they tend to display symptoms differently, reports WebMD. Depression among the elderly is often confused with the effects of medicine used to treat other illnesses. It differs from the condition experienced by younger individuals because it often lasts longer and occurs alongside other disabilities. Insomnia, which is a common symptom of depression, is also a risk factor for depression in the elderly.