If you have suspicions that your teen may be depressed, this article may help you determine whether it is depression or just sadness. Feeling sad, down, or disheartened are natural human emotions and reactions to the hardships of life, but depression is different. Depression is a strong mood involving sadness, discouragement, despair, or hopelessness that lasts for weeks, months, or even longer. Depression drains the motivation, energy, and concentration of the person it affects, and it can even cause aches and pains in the body. One sign that your child may be depressed is that they are pulling away from friends, family, or activities that they once enjoyed, which will ultimately make them feel more lonely. People with depression may also feel tired and exhausted and it may take them longer to do everyday activities. And depression also has physical symptoms, such as a loss of appetite or weight gain or loss. If you believe your teen may be depressed, schedule a consultation with your pediatrician to discuss your concerns.