Hello Dear Reader,
Developing symptoms of decrease concentration, tiredness, appetite disturbances and increased sleep at age of 17 years can have multiple causes ranging from vitamin deficiencies, harmonal issues or may be because of stress. If you are having any stress related to your studies or relationship status, it needs to be talked in details with family members, closed friends or a professional and definitely a solution can be sought for. Go for regular exercise and balanced diet it helps in improving concentration. But if the symptoms are associated with mood issues, increased anger, loneliness and negative thoughts about self or future, then it may be depression and immediate help must be sought.
All the best.