You are not alone. Depression can be treated. When someone is suffering from depression it is not always obvious. Due to stigma, shame and discrimination many people hide how they are feeling from friends, family and doctors. You may be suffering from depression if you are experiencing persistent sadness; loss of pleasure in things you usually enjoyed; feelings of guilt, worthlessness or helplessness; increased irritability, restlessness or fatigue; difficulty concentrating or making decisions; increased problems with sleep or appetite; aches or other physical pain that do not go away with treatment; or frequent thoughts of death, dying or suicide. When five or more of these are affecting your functioning at work, school or relationships, seeking help is critical.