This is true even if the individual sought short term therapy to get over the rough spot. If an episode does not pass, is more severe then usual, or seems to be getting worse, more intensive therapy or anti-depressant drugs may be needed. Depression can occur at any age. It is not always easy to detect. The outward signs may be nothing more than an unusual quiet.
Most people suffering from depression have feelings of hopelessness and despair.
The extreme end of depression is suicide. All talk of suicide should be taken seriously. Many attempted suicides are cries for help that went unheeded. The person is unwilling to communicate, and appears to have an overwhelming urge to be alone. If the high is not explainable, and follows gloom this is a danger sign that the person may have decided suicide is the solution to the problem.