According to the Mayo Clinic:
“Teen depression is a serious medical problem that causes a persistent feeling of sadness and loss of interest in activities. It affects how your teen thinks, feels and behaves, and it can cause emotional, functional and physical problems. Although mood disorders, such as depression, can occur at any time in life, symptoms may be different between teens and adults.
Issues such as peer pressure, academic expectations, and changing bodies can bring a lot of ups and downs for teens. But for some teens, the lows are more than just temporary feelings — they’re a symptom of depression.
Teen depression isn’t a weakness or something that can be overcome with willpower — it can have serious consequences and requires long-term treatment. For most teens, depression symptoms ease with treatment such as medication and psychological counseling.”