Teenage depression is widespread and can become a life-long illness. But more often than not this is a temporary condition say researchers from University Of California - Los Angeles Health Sciences. According to them adolescent depression can be as high as 20 per cent or higher. Most of the depressions will be short-lived but of those who have adolescent depression perhaps 40 per cent will have recurring depression and many of those will likely be life-long. Researchers say that many things can make teenagers depressed. But in about 60 per cent of the cases the depression does not foretell future